the profit realized by the sales of a particular item follows a normal distribution with a mean of $0.5 million per quarter and a standard deviation of $0.1 million per quarter. what percent of the quarters can be expected to see a profit of at least $0.5 million?

Answers

Answer 1

98% of the quarters can be expected to see a profit of at least $0.5 million.

What is a standard deviation?

In statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean of the set, while a high standard deviation indicates that the values are spread out over a wider range.

Z score = 0.7-0.5 = 0.2

σ = 0.1

P-value from Z-Table:

P(x<0.5) = 0.97725

             ≈ 98%

Hence, 98% of the quarters can be expected to see a profit of at least $0.5 million.

To learn more about standard deviation, visit:

https://brainly.com/question/475676

#SPJ4


Related Questions

I need help fast please!!
Name the Property of Congruence that justifies the statement:
A. Symmetric Property
B. Transitive Property
C. Reflexive Property
D. none of the above

Answers

Answer:

A. Symmetric Property

Step-by-step explanation:

The Symmetric Propertry states that if x = y, then y = x.

Since XY = WX, and WX = XY, its the Symmetric Property.

16. if alexa's car can typically travel 300 miles on a full tank of gasoline, and if her car's tank can hold 18 gallons, then at this rate how far should the car be able to travel on 12 gallons of gasoline?

Answers

The distance covered by the car with 12 gallons of gasoline is 200 miles.

Given,

Distance travelled by a car with full  tank gasoline = 300 miles

The capacity of the car's tank = 18 gallons

We have to find the distance covered by the car with 12 gallons of gasoline;

Here,

x be the distance covered by the car with 12 gallons of gasoline

Then,

300/18 = x/12

x = (300 x 12) / 18

x = (300 x 2) / 3

x = 100 x 2

x = 200 miles

That is,

The car will cover 200 miles with 12 gallons of gasoline.

Learn more about distance covered by a car here;

https://brainly.com/question/20777263

#SPJ4

A student reads at a constant rate in her chapter book, where the red fern grows. This can be described by the equation y=1/2x. Complete the chart below.

(Pls help)

Answers

The chart can be completed by substituting the value of x and y in the given equation in two variable y = 1/2 x

What are Linear Equations in Two Variables?

The linear equations in two variables are the equations in which each of the two variables are of the highest exponent order of 1 and have one, none, or infinitely many solutions. The standard form of a two-variable linear equation is ax + by + c = 0 where x and y are the two variables.

According to the given question:

(Check the attachment below for complete question)

The given function is y = x/2

Let x be the minutes taken by the student and y be the pages read by him.

The chart can be completed by substituting the value of x that is minutes taken in the given equation to find the value of y. (Check attachment below)

If the teacher recommended that student must be read 20 min each night then the page read by the student is y = 20/2 = 10 pages.

If he reads 18 pages then time taken by him is x = 2×18 = 36 min.

If there are 245 pages then the time taken by the student is  

x= 2×245 = 490 min        

To know more about linear equation in two variables visit

https://brainly.com/question/24085666

#SPJ1

A group of friends wants to go to the amusement park. They have no more than $115 to spend on parking and admission. Parking is $15, and tickets cost $25 per person, including tax. Write and solve an inequality which can be used to determine xx, the number of people who can go to the amusement park

Answers

Step-by-step explanation:

A group of friends wants to go to the amusement park. They have no more than $115 to spend on parking and admission. Parking is $15, and tickets cost $25 per person, including tax. Write and solve an inequality which can be used to determine x, the number of people who can go to the amusement park.

115 ≥ 25p + 15

115 ≥ 25p + 15

subtract 15 from both sides:

115 - 15 ≥ 25p + 15 - 15

100 ≥ 25p

divide both sides by 25:

100/25 ≥ 25p/25

4 ≥ p

4 people

The number of people who can go to the amusement park is 4.

What is an inequality?

In mathematics, an inequality is a relation which makes a non-equal comparison between two numbers or other mathematical expressions. It is used most often to compare two numbers on the number lineby their size.

Given that, the money to be spend, is no more than $115 to spend on parking and admission.

Parking is $15, and tickets cost $25 per person, including tax.

we need to determine the maximum number of people that can go to the park,

115 ≥ 25p + 15

115 ≥ 25p + 15

subtract 15 from both sides:

115 - 15 ≥ 25p + 15 - 15

100 ≥ 25p

divide both sides by 25:

100/25 ≥ 25p/25

4 ≥ p

Hence, the number of people who can go to the amusement park is 4.

Learn more about inequality click;

https://brainly.com/question/30231190

#SPJ2

In recent years, only 79% of the fruit sold at Fred's Fruit stand has been any good. Fred recently started buying fruit from new farmers and wants to know if there is a statistically significant increase in the percentage of good fruit. In a random sample of 475 pieces, 85 were bad.

Answers

The conclusion does not change if the significance level went from 7% to 5%.

According to the given situation, 79% of the fruits sold are good and whether there is an increase in the percentage of good fruit is to be tested. If there is no increase in percentage of good fruit, p = 0.79 and if there is an increase in percentage of good fruit, p > 0.79.

The test statistic is given by z = (X - µ)/(σ/√n)

In the given data, µ = 0.79 and σ = √(0.79(1-0.79) = 0.407

In a random sample n = 475 and 85 are bad.

Good fruits = 475 – 85 = 390

X = 390/475 = 0.8211

Hence,

z = (0.8211 – 0.79)/(0.407/√475) = 1.66

From the z-table, p value is 0.9515.

The p value of the test that no increase in percentage of good fruits = 1 – 0.9515 = 0.0485

If the p-value is less than 0.05 it is statistically significant. As 0.0486 is less than 0.05 and 0.07 there is sufficient evidence to conclude that there is a statistically significant increase in the percentage of good fruit. It is true for each significance level. Hence, the change in significance levels does not change the conclusion.

Note: The question is incomplete. The complete question probably is: In recent years, only 79% of the fruit sold at Fred's Fruit stand has been any good. Fred recently started buying fruit from new farmers and wants to know if there is a statistically significant increase in the percentage of good fruit. In a random sample of 475 pieces, 85 were bad. How would the conclusion change if the significance level went from 7% to 5%?

Learn more about Significance level:

https://brainly.com/question/15414435

#SPJ4

Solve for x: x^2 + 6√3 x – 9 = 0

Answers

Step-by-step explanation:

use this equation : if , ax² + bx + c = 0

[tex] x \: = \frac{ - b \: \frac{ + }{ } \sqrt{ {b}^{2} - 4ac} \: }{2a} [/tex]so here, a = 1 b = 6√3 c = -9

let's use the formula .......

[tex]x \: = \: \frac{ - 6 \sqrt{3} \frac{ + }{} \sqrt{36 \times 3 - 4(1)( - 9)} }{2(1)} [/tex]

[tex]x \: = \: \frac{ - 6 \sqrt{3} \frac{ + }{} \sqrt{108 \: + 36} }{2} [/tex]

[tex]x \: = \: \frac{ - 6 \sqrt{3} \frac{ + }{} \sqrt{144} }{2} [/tex]

[tex]x \: = \: \frac{ - 6 \sqrt{3} \frac{ + }{} 12 }{2} [/tex]

[tex]x \: = \: \frac{ - 6 \sqrt{3} + 12 }{2} [/tex] OR .......

[tex]x \: = \: \frac{ - 6 \sqrt{3} - 12 }{2} [/tex]

so , X = -3√3 +6 ............ or X = -3√3 -6 ............

1. Marcus is training for a bike race and has biked 25 miles this week. He needs to bike at least
80 miles this week to complete his training. How many miles should Marcus bike on each of the 5
remaining days this week?

Answers

Answer: 11 miles each day for the remaining 5 days

Step-by-step explanation:

First, you subtract the miles already done (25) from the total (80) to get 55 (miles left to do) then next divide 55 by 5 (days left), and then your left with 11. Finally, check the work and see how 11x5=55 then 55+25=80.

That's how to get the answer :)

11 miles each day for the remaining 5 days. 80-25=55. 55/5=11

unlike the coefficient of determination, the sample correlation coefficient in a simple linear regression . multiple choice can be greater than 1 measures the percentage of variation explained by the regression line indicates whether the slope of the regression line is positive or negative is a proportion

Answers

the regression line indicates whether the slope of the regression line is positive or negative is a proportion will be between 0 to 1

Regression is a statistical method that links a dependent variable to one or more independent (explanatory) variables. A regression model can demonstrate whether variations in the dependent variable are related to variations in one or more of the explanatory variables.

Learn more about regression here

https://brainly.com/question/28178214

#SPJ4

At a clothing store, ted bought 4 shirts and 2 ties for a total price of $95. At the same time store, stephen bought 3 shirts and 3 ties for $84. Each shirt was the same price, and each tie was the same price. Which system of equations can be used to find s, the cost of each shirt in dollar, and t, the cost of each tie in dollars ?.

Answers

The required system of equation for the cost of shirt and tie are-

4s + 2t = 953s + 3t = 84 Explain the term system of equations?simultaneous equations, or a system of equations, In order for two or so more equations in algebra to be solved jointly, the system's equations must all be satisfied by the solution. The quantity of equations must match the number of unknowns for a system to have a singular solution.

For the stated question-

Ted spent a total of $95 on 4 shirts and 2 ties from a clothes store. Stephen spent $84 on three shirts and three ties at the same time store. Each shirt and each tie cost the same amount.

Let 's' be the cost of each shirt.

Let 't; be the cost of each tie.

Then, the equations become-

4s + 2t = 95

3s + 3t = 84 are the required system of equation.

To know more about the system of equations, here

https://brainly.com/question/25976025

#SPJ4

If x = 2, y = -5 and z = -7, then find the value of the following expression. (4x^3-10)/((〖3y〗^2+5)-(〖4x〗^3 (z^2-8))/((y^3+5)))

Answers

The value of the mentioned expression is -43.24.

To solve the expression, firstly rewriting the equation followed by keeping the values of x, y and z at their respective places.

Equation = (4x³ - 10)/(3y² + 5) - (4x³ (z² - 8))/(y³ + 5)

Now keeping the values of each variable in the equation

Equation = (4×2³ - 10)/(3×(-5)²) - (4×2³ ((-7)² - 8))/((-5)³ + 5)

Taking cube and square on Right Hand Side of the equation

Equation = (4×8 - 10/(3×15)) - (4×8 (49 - 8))/(25 + 5)

Solving the bracket first where we will perform multiplication on the Right Hand Side

Equation = (32 - 10/45) - ((32 × 41)/30)

Equation = 22/45 - 1312/30

Now performing division on Right Hand Side of the equation

Equation = 0.49 - 43.73

Performing subtraction on Right Hand Side of the equation

Equation = -43.24

Hence, the value is -43.24.

Learn more about expression -

https://brainly.com/question/1859113

#SPJ4

w + 2 + 2(w + 3)

HELP FASTTTT

Answers

Answer:

Step-by-step explanation:

=w + 2 + 2w + 6

= 3w + 8

3w = -8

w =-8/3

via gelato is a popular neighborhood gelato shop. the company has provided the following cost formulas and actual results for the month of june: fixed element per month variable element per liter actual total for june revenue $ 13.00 $ 72,540 raw materials $ 4.75 $ 30,330 wages $ 5,700 $ 1.50 $ 14,560 utilities $ 1,730 $ 0.30 $ 3,800 rent $ 2,700 $ 2,700 insurance $ 1,450 $ 1,450 miscellaneous $ 660 0.45 $ 2,990 while gelato is sold by the cone or cup, the shop measures its activity in terms of the total number of liters of gelato sold. for example, wages should be $5,700 plus $1.50 per liter of gelato sold and the actual wages for june were $14,560. via gelato expected to sell 6,000 liters in june, but actually sold 6,200 liters.

Answers

Via Gelato total revenue for the month of June as the the details of expenses is equal to $7870.

As given in the question,

Total revenue is:

= (6200 × 13) - 72,540

=$ 8060

Details of all expenses are as follow:

Expense on raw material:

= (6200 × 4.75) -30,330

= -$880

Wages :

= (6200 ×1. 50) + 5,700 - 14,560

= $440

Utilities:

= (6200 × 0.30) +1730 - 3,800

= -$210

Rent:

= (2700-2700)

= 0

Insurance :

= (1450-1450)

= 0

Miscellaneous :

= (6200 × 0.45) + 660 -2,990

= $460

Total expense

=-$190

Net operating income :

=$ [8060-190]

=$7870

Therefore, Via Gelato's  total revenue of the June month is equal to $7870.

Learn more about revenue here

brainly.com/question/13563292

#SPJ4

Triangle ABC has vertices A(-6, 6), B(4, 2), and C(-4, 0).

Which statement about triangle ABC is true?



A. Since none of the sides are congruent, it is not a right triangle.

B. Since none of the sides have slopes that are negative reciprocals, it is not a right triangle.

C. Since two of the sides have slopes that are negative reciprocals, it is a right triangle.

D. Since two of the sides are congruent, it is a right triangle.

Answers

The statement that is true about the triangle ABC with vertices A(-6, 6), B(4, 2), and C(-4, 0) is C. Since two of the sides have slopes that are negative reciprocals, it is a right triangle.

How to check if the triangle is right triangle

Right triangles are triangles with have perpendicular relationships

The lines will be checked for perpendicularity by calculating the slopes, if any two slopes are negative reciprocals then they are perpendicular and the triangle is a right triangle'

the points A(-6, 6), B(4, 2), and C(-4, 0)

Using point A(-6, 6) and B(4, 2)

m = (y₂ - y₁) / (x₂ - x₁)

m = (4 - 6) / (2 - -6)

m = -1/2

Using point B(4, 2), and C(-4, 0)

m = (y₂ - y₁) / (x₂ - x₁)

m = (4 - -4) / (2 - 0)

m = 2

Comparing the slopes shows that slopes calculated are negative reciprocals

2 and -1/2

Therefore the triangle is a right triangle

Learn more about slopes of linear equation at:

https://brainly.com/question/29334541

#SPJ1

Which of the following techniques might be most useful in helping a restaurant determine how to position itself in the marketplace?
a. factor analysis
b. multiple regression analysis
c. conjoint analysis
d. perceptual mapping

Answers

B.multiple regression analysis

a rectangular lot measures 60 feet wide and has an area of 1,200 square yards. what is the depth of the lot?

Answers

The depth of the given rectangular lot is 60 yards.

Here, we are given that the area of a rectangular lot is 1,200 square yards.

Further the width of the lot is 60 feet

As the area and the width are given in different units, we first need to convert them into the same units.

Now, 1 foot = 0.33 yards

⇒ 60 feet = 0.33*60 yards

= 20 yards

Further, we know that the area of a rectangle is given by the formula-

area = length × breadth

Thus,

1,200 = 20 × breadth

1,200/20 = breadth

breadth = 60 yards

Thus, we find that the depth of the given rectangular lot is 60 yards.

Learn more about area here-

https://brainly.com/question/25292087

#SPJ4

a flipped coin can land in one of two states: heads or tails. write a vi that simulates simultaneously flipping four coins and determines how many of these coins land in the heads state.

Answers

The probability flipping of four coin that will give head is 0.93

Probability:

In statistics, Probability defines the possible way of occurring a particular event.

Given,

A flipped coin can land in one of two states: heads or tails.

Here we need to find the probability while flipping four coins then  how many of these coins land in the heads state.

In order to calculate the probability of these event, we have to know the values of the sample space and the possible number of events,

Here the value of sample space is written as,

S = {HHHH, TTTT, HHHT, HHTH, HTHH, THHH, HHTT, HTTH, HTHT, THHT, THTH, TTHH, HTTT, THTT, TTHT, TTTH}

So, the value of n(S) = 16

The possible number of way to obtain the head state is,

E = {HHHH, HHHT, HHTH, HTHH, THHH, HHTT, HTTH, HTHT, THHT, THTH, TTHH, HTTT, THTT, TTHT, TTTH}

the value of n(E) = 15.

Therefore, the probability of getting head state is

=> P(E) = 15/16

=> P(E) = 0.93

To know more about Probability here.

https://brainly.com/question/11234923

#SPJ4

what is the actual explanation of what happens when you subtract a negative number from another negative number

Answers

a negative plus a negative equal’s positive. for example, -2 - -2 is 0, another example is -6 - -10 is 4

create a table of values and graph the following function rule. you must find at least 4 points in your table/graph. then, determine if the function is linear or non-linear, explaining your reasoning. show your work. y=2x^2-5.

then answer if the function is linear or nonlinear. explain?

please someone answer this ASAP I will give brainlist and 100 points!!!!! please.

Answers

The function y = 2x² - 5 is a nonlinear equation and the table of values is

x    0     1    2    3

y    -5    -3   5    13

How to determine the category of the equation?

From the question, we have the following equation that can be used in our computation:

y = 2x² - 5

As a general rule, a linear equation can take any of the following forms

Slope-intercept form: y = mx + xStandard form: Ax + Bx = CPoint slope form: y - Y = m(x - X)

By comparing y = 2x² - 5 to the above forms, we can see that the equation does not take any of the forms represented above

This means that the function is not a linear function

i.e. The function is a nonlinear function

Also, we set x = 0, 1, 2 and 3

So, we have

y = 2(0)² - 5= -5

y = 2(1)² - 5= -3

y = 2(2)² - 5= 5

y = 2(3)² - 5 = 13

So, the table of values is

x    0     1    2    3

y    -5    -3   5    13

Read more about equations at

https://brainly.com/question/2030026

#SPJ1

two websites sell the same type of headphones. website a website b e47.68 16.95 cost of headphones cost of postage including the cost of postage which website is cheaper and by how much? e49.95 14.39

Answers

Website B is cheaper then website A.

What are headphones?

A user wears headphones, which are a pair of small loudspeaker drivers, on or near their head over their ears.

They function as electroacoustic transducers, converting an electrical signal into an associated sound.

People can listen to music and carry on conversations at any time and from any location thanks to headphones. It is impossible to overstate how simple it is to use headphones and how much mobility they provide.

There are two types of headphones, website A and website B.

First to find the cost for website A.

Cost of website A = Cost of headphone + cost of postage

                              = 47.68 + 16.96

Cost of website A = 64.63

Cost of website B = Cost of headphone + cost of postage

                              = 49.95 + 14.39

Cost of website B = 64.34

The cost of website B is less than the cost of website A.

Hence, website B is cheaper then website A.

To know more about headphones, click on the link

https://brainly.com/question/26314966

#SPJ4

what is the statement of |×+1|+5=2​

Answers

Step-by-step explanation:

|x+1|=2-5

|x+1|= -3

statement doesn't have solution


Please I need help on this I don’t get how to do it, show your explanation please and thank you!

Answers

Answer:

  B/A = 1/2

Step-by-step explanation:

You want the scale factor between the two figures shown.

Scale factor

The scale factor is the ratio of the length in one figure to the corresponding length in the other figure. Often, we're interested in the scale factor B/A, which is what A dimensions need to be multiplied by in order to match the B dimensions.

Application

You can pick any corresponding dimensions. Often, it is convenient to choose a short one, so you don't have to count so many grid squares.

We can choose the line from the center, where the lines cross, up and to the right to the upper right corner. In the A figure, that line goes 2 squares to the right and 2 squares up. In the B figure, that line goes 1 square right and 1 square up. Then the scale factor is ...

  (B dimension)/(A dimension) = 1/2

We can choose to look at the lengths of that line (A: 2√2; B: √2), or the x-dimension (A: 2; B: 1) or the y-dimension (A: 2; B: 1). All the measurements are proportional, so we get the same ratio for any pair of corresponding measures.

The scale factor B/A is 1/2.

__

Additional comment

The horizontal magenta lines in the attached figure are another possibility for determining the scale factor. B/A = 2/4 = 1/2.

You need to be careful to understand what scale factor you want. Sometimes it is described as "A to B", which can be ambiguous.

Here, the ratio of an A dimension to a B dimension is A : B = 2 : 1. The same wording can be interpreted to mean "the scale factor that multiplies A to transform it to B." That is the scale factor we have shown.

What could be the right answer for this question? with explanation pls. :))

Answers

Answer:

x ≤ -5

Step-by-step explanation:

Treat this EXACTLY like you would an equation:

-3(x+4) ≥ x+8

-3x - 12 ≥ x + 8

-4x - 12 ≥ 8

-4x ≥ 20

Except here (when dividing BOTH sides by a negative):

-4x ≥ 20  ⇒  x ≤ -5

2(vh)/k=r Solve equation for v in terms of all other variables involved

Answers

The equation v in terms of other variables is v = kr/2h

What is the subject of an equation?

It is a variable which is expressed in terms of other variables involved in the formula.

Formulas are written so that a single variable, the subject of the formula is on the L.H.S. of the equation. Everything else goes on the right side of the equation. We evaluate the formula by substituting for the literal numbers on the right hand side.

2(vh) / k = r

by cross multiplication

2(vh) = kr

divide both sides by 2h

v = kr/2h

In conclusion, v in terms of other variables is  kr/2h

Learn more about subject of an equation: https://brainly.com/question/657646

#SPJ1

Three positive numbers are in the ratio 7:3:2. The sum of the least number and the greatest number exceeds twice the remaining number by 30. Find the three numbers.

Answers

The three numbers that are in the ratio 7:3:2 are 70, 30, and 20.

What is the ratio?

A ratio in mathematics demonstrates how many times one number is present in another.

For instance, if a dish of the fruit contains eight oranges and six lemons, the ratio of oranges to lemons is eight to six.

The ratio of oranges to the total amount of fruit is 8:14, and the ratio of lemons to oranges is 6:8.

So, let 7x, 3x, and 2x be the three numbers.

7x+2x = 9x is the product of the lowest and greatest number.

In accordance with:

9x-30=2(3x)

To make the equation easier:

9x-30=6x

30 extra on both sides:

9x=6x+30 or,9x-6x=30

3x=30, x=10,

So, the numbers will be:

7x=7(10) = 70

3x=3(10) = 30

2x=2(10) = 20

Therefore, the three numbers that are in the ratio 7:3:2 are 70, 30, and 20.

Know more about the ratio here:

https://brainly.com/question/28896354

#SPJ4

3 Isosceles Trapezoid
128°
y is to the left of it
X is diagonal to it
What is x and y

Answers

Answer:

x = 52°y = 128°

Step-by-step explanation:

Base angles are congruent.

[tex]\tt y=128^o[/tex]

Let's solve for x first:-

[tex]\tt x+y=180^o[/tex]

[tex]\tt x=180-y[/tex]

[tex]\tt x=180-128[/tex]

[tex]\tt x=52^o[/tex]

Therefore, x = 52° and y = 128°

_________________

Hope this helps you!

Have a nice day! :)

if f(x)= 5x+7 then what is f(7)

A. 64
B. 42
C. 19

Answers

Answer:

f(7)= 42

Step-by-step explanation:

we fill in 7 where x is

f(7)=5(7)+7

f(7)=35+7

f(7)=42

Hopes this helps please mark brainliest

The length of a rectangle is two feet greater than twice its width. If the perimeter is 25 feet, find the width which of the following is correct 25=2L+2(2+2W)

Answers

Answer:

w=7/2=3.5

Step-by-step explanation:

width =w

length = l = 2w+2

25=2(l+w)= 2(2w+2+w) =2(3w+2)=6w+4

25=6w+4

6w=21

w= 21/6 = 7/2

Ue the right triangle and the given information to olve the triangle. A = 3; b = 64\deg ; find b, c, and a

Answers

The value of sides of the right triangle are a = 3 units, b = 12.47 units and c = 11.21 units.

Define the term trigonometric identities?Trigonometric Identities are equality statements that hold true for all values of the variables in the equation and that use trigonometry functions. There are numerous distinctive trigonometric identities that relate a triangle's side length and angle.

For the given question-

The length of the side are-

a = 3 units

Angle B = 64°.

Then,

Applying trigonometric properties-

Tan B = b/a

b = a tan B

b = 3 tan 64°

b = 12.47 units

Now,

Sin B = b/c

c = b sin B

c = 12.47 sin 64°

c = 11.21 units.

Thus, the value of sides of the right triangle are a = 3 units, b = 12.47 units and c = 11.21 units.

To know more about the trigonometric identities, here

https://brainly.com/question/7331447

#SPJ4

twenty high school students took an examination and received the following scores: 70, 60, 75, 68, 85, 86, 78, 72, 82, 88, 88, 73, 74, 79, 86, 82, 90, 92, 93, 73 determine what percent of the students scored within ( ) one standard deviation of the mean

Answers

70% of students had scores that were within (±) one standard deviation of the mean.

Explain the term standard deviation?The term "standard deviation" (or "σ") refers to a measurement of the data's dispersion from the mean. A low standard deviation indicates that the data are grouped around the mean, whereas a high standard deviation shows that the data are more dispersed.

For the stated question-

Total number of students = 20

Scores received; 70, 60, 75, 68, 85, 86, 78, 72, 82, 88, 88, 73, 74, 79, 86, 82, 90, 92, 93, 73.

Mean = Sum of all/ Total number

Mean x = 79.7

standard deviation = 8.7

Thus, (±) one standard deviation SD of the mean becomes;

-1 SD; 79.7 - 8.7 ≈ 70.994

+1 SD; 79.7 + 8.7 ≈ 88.406

Thus, 71 to 88

Percentage = scores between  71 to 88/ total scores

Percentage = 14/20 x 100 %

Percentage = 70%

Thus, 70% of students had scores that were within (±) one standard deviation of the mean.

To know more about the standard deviation, here

https://brainly.com/question/475676

#SPJ4

Explain how comparing the values of two signed numbers is different than comparing their absolute value?

Answers

The difference between the value of two signed numbers and the absolute value is that

signed numbers does not neglect the signs, they can be positive or negative while absolute value gives the positive valueIn a number line signed numbers have specific positions and directions while absolute values ranges from the zero to the positive

What are signed numbers?

Positive and negative numbers are referred to as signed numbers. The number is automatically regarded as positive if no sign is present.

On a number line, positive numbers are those to the right of zero. Negative numbers are those to the left of 0

What are absolute values?

Without taking direction into account, absolute value describes how far away from zero a certain number is on the number line.

A number can never have a negative absolute value.

Learn more absolute values here:

https://brainly.com/question/29532815

#SPJ1

Other Questions
dalton supported his atomic theory with experimental evidence. what experiment would have supported the postulate that in chemical reactions, atoms are combined, separated, or rearranged A sociogram is a powerful tool because it can be used to document the direction and intensity of communication, as well as the content of what was communicated by the members in their attempt to influence one another. Select one: a. True b. False A condition in which body tissues become frozen. Hypertension Frostbite Cold What is the total number of atp molecules produced through cellular respiration per molecule of glucose?. Evaluate the expression 9x - 5 for the values of x given in the first column.Value of x Value of expression5412967 dat ting go boom then goes huge to the top make it drop triangle enterprises has both debt and equity, and it can borrow at 9 percent. the firm's wacc is currently 14.7 percent, and there is no corporate tax. if the firm has 70 percent debt, what will its cost of equity be? what can happen when a government continues to use expansionary fiscal policy even as government debt becomes a problem? The cash flow statement should be evaluated by examining the cash flow pattern ______. discuss the advantages and disadvantages of using advanced ceramics in the structure of internal combustion engines. Research suggests that the greater the number of individuals who witness a person in trouble, theA. more likely it is that any one person will help the person in need.B. more sympathy any one person will feel toward the person in need.C. less likely it is that any one person will help the person in need.D. less sympathy any one person will feel toward the person in need. a 10 kg mass a travels 2 m/s meets and collides elastically with a 2 kg mass b travels 4 m/s in the opposite direction. find the final Mara lives in st. Louis, which is close to sea level. She decides to spend a month of her summer vacation working in the mountains outside of denver. After a week in the mountains, what kinds of changes would you expect to see as mara adapts to the higher altitude?. A nurse is talking with an older adult client who is contemplating retirement. The client states, "I keep thinking about how much I enjoy my job. I'm not sure I want to retire." Which of the following responses should the nurse make?a. "You would have so much more time to spend with your family."b. "You should consider getting a part-time job or doing volunteer work."c. "Let's talk about how the change in your job status will affect you."d. "Why wouldn't you want to retire and relax?" which clinical manifestations would tell a nurse that a client is having progressive decompensation related to obstruction of urinary outflow? for a hypothetical mouse population, determine whether the actions described will increase kkk , decrease kkk , or not affect kkk . drag each statement to the appropriate bin. The difference between light marking machine and UV marking machine public meeting places, often taverns, that served as headquarters for gangs and thieves in the eighteenth century were known as: Who is Gregor Mendel what tools can a project manager use to account for issues that may cause a project delay? select all that apply.