Assuming the population standard deviation is known and the standard deviation of the sample mean x : option (b) is correct : the standard error of the sample mean decreases.
Central Limit theory:In probability theory, the central limit theorem (CLT) states that the distribution of a sample variable approximates a normal distribution (i.e., a “bell curve”) as the sample size becomes larger, assuming that all samples are identical in size, and regardless of the population's actual distribution shape.
Standard deviation:Standard deviation is a calculation of the dispersion or variation in a set of numbers. If the standard deviation is a small number, it means the data points are close to their average value. If the deviation is large, it means the numbers are spread out, further from the mean or average.
There are different ways to write out the steps of the population standard deviation calculation into an equation. A common equation is:
σ = ([Σ(x - u)2]/N)1/2
Where:
σ is the population standard deviation
Σ represents the sum or total from 1 to N
x is an individual value
u is the average of the population
N is the total number of the population
Sample Mean:A sample mean is an average of a set of data . The sample mean can be used to calculate the central tendency, standard deviation and the variance of a data set. The sample mean can be applied to a variety of uses, including calculating population averages.
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Consider the exponential function f(x) = one-fifth(15x). What is the value of the growth factor of the function?one-fifthone-third515.
The value of the growth factor of the function is found as 15.
Explain the term exponential function?The formula for an exponential function is f (x) = aˣ, where x is a variable and a is a constant that serves as the function's base and must be greater than 0.A exponential function is one where the exponent contains the input, x.
Typically, an exponential function's equation looks like this:
y = abˣ
where,
The initial value, or a, is a number.The growth factor is an integer with the value b.In this issue
There are;
f(x) = 1/5.(15ˣ)
where,
1/5 -------> is the starting point.
15 --------> the growth factor.
Thus, the value of the growth factor of the function is found as 15.
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Answer:
D) 15 is the answer
Step-by-step explanation:
3 1/2 4. 2/5= ?
Please help me answer it please (you get 35 points
)
The Resulting values are
1. By adding
3 1/2 + 4 2/5= 79/10
2. Subtraction
3 1/2 - 4 2/5 = -9/10
3. By Multiplying
3 1/2 x 4 2/5 = 154/ 10
4. By Dividing
3 1/2 ÷ 4 2/5 = 35/44
What is fraction?The fractional bar is a horizontal bar that divides the numerator and denominator of every fraction into these two halves.
The number of parts into which the whole has been divided is shown by the denominator. It is positioned in the fraction's lower portion, below the fractional bar.How many sections of the fraction are displayed or chosen is shown in the numerator. It is positioned above the fractional bar in the upper portion of the fraction.Given:
3 1/2 4. 2/5
So, by adding
= 3 1/2 + 4 2/5
= 7/2 + 22/5
= 79/10
So, by Subtraction
= 3 1/2 - 4 2/5
= 7/2 - 22/5
= -9/10
So, by Multiplying
= 3 1/2 x 4 2/5
= 7/2 x 22/5
= 154/ 10
So, by Dividing
= 3 1/2 ÷ 4 2/5
= 7/2 ÷ 22/5
= 7/2 x 5/22
= 35/44
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in a study of a disease in which all cases that developed were ascertained, if the relative risk for the association between a factor and the disease is equal to or less than 1.0, then:
For the given statement , correct answer is option e: there is either no association or a negative association between the factor and the disease.
Reason with explanation:
Relative risk is a ratio which help us to compares the risk of a health between two groups. When the value of relative risk is 1, it represents the risk among the two groups is same. When the value of relative risk is > 1, it represents the risk is increased for the exposed group. And when relative risk < 1, it represents exposure protect against the disease. Hence for the given statement , a value of relative risk is equal or less than represents there is no association or negative association between a factor or a disease.The complete question is:
In a study of a disease in which all cases that developed were ascertained, if the relative risk for the association between a factor and the disease is equal to or less than 1.0, then:
a. There is no association between the factor and the disease
b. The factor protects against development of the disease
c. Either matching or randomization has been unsuccessful
d. The comparison group used was unsuitable, and a valid comparison is not possible
e. There is either no association or a negative association between the factor and the disease
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W varies jointly as x and y and inversely as the square of z. If w = 280 when x = 30, y = 12, and z = 3, find w when x = 20, y = 10 and z = 2. 117 350 69.
Using the inversely proportional method, we know that w=350.
What do we mean by inversely proportional?If two quantities are inversely related, one will increase while the other will decrease.
Building a wall would be an example of an inverse proportion in action.
The time it takes to construct a wall decreases as more people work on it.
So, the following is an expression for the joint variation of W with x, y, and z:
W = kxy / z²
Where k is the variational constant.
When the variables are given the initial set of values:
280 = k(30)(12) / 3²
K in the equation has a value of 7.
By adding the values of the subsequent:
w = (7)(20)(10) / 2² = 350
Therefore, using the inversely proportional method, we know that w=350.
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Answer:
350
Step-by-step explanation:
odyssey
Manuel found a wrecked Trans-Am that he could fix. He bought the car for 65% of the original price of $7200. What did he pay for the car (round answer to the nearest dollar)?
Answer:
4680
Step-by-step explanation:
cassie pulled the boat onto the ice and adjusted its sails. once she got started she would be able to steer, change direction and control her speed with a few twists of the ropes. giving the boat a mighty heave across the ice, cassie jumped in.
Wind Energy is the kind of energy will Cassie uses to power the boat cassie jumped in.
What is wind energy?
The method of producing electricity using air or wind currents that naturally occur in the earth's atmosphere is known as wind energy (or wind power). Electricity is produced by modern wind turbines that harness the kinetic energy of the wind. Wind passing across the turbine's blades is the initial step.
What is the major problem with wind energy?
Wind energy has the potential to have negative environmental effects, including the possibility of reducing, fragmenting, or deteriorating habitat for wildlife, fish, and plants, as with all energy supply choices. Furthermore, flying animals like birds and bats may be harmed by turbine blades in operation.
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Jonah has recorded 32 shows using his cable television service. Each week he records 6 new shows
Answer: he need 6 day to get the 32 show
Determine whether the pair of lines appear to be parallel or perpendicular.
1. The lines are perpendicular because they are always the same distance apart and never intersect.
2. The lines are parallel because they are always the same distance apart and never intersect.
3. The lines are parallel because they intersect at a right angle.
4. The lines are perpendicular because they intersect at a right angle.
The correct statement about the pair of lines will be;
''The lines are perpendicular because they intersect at a right angle.''
Option 4 is true.
What is Line segment?
Line segment is a part of the line which have two endpoints and bounded by two distinct end points and contain every point on the line which is between its endpoint.
Given that;
The pair of lines are shown in figure.
Now,
By figure, we see that;
The lines are perpendicular because they intersect at a right angle.
Thus, The correct statement about the pair of lines will be;
''The lines are perpendicular because they intersect at a right angle.''
Option 4 is true.
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How to show you work on 48 inches to Convert it to feet?
Answer:
Step-by-step explanation
How many feet in a centimeter. One centimeter is equal to 0.0328084 feet: 1cm = 1cm / 30.48cm/ft = 0.0328084ft.
How many centimeters in a foot. One foot is equal to 30.48 centimeters: 1ft = 30.48×1ft = 30.48cm.
How to convert 10cm to feet. Divide 10 centimeters by 30.48 to get feet:
Answer: 4 feet
Step-by-step explanation: 12 inches = 1 foot
48in/12 = 4
a rectangular pasture has a perimeter of 1200 feet. the pasture's length is 200 feet more than its width. what is the area of the pasture?
The area of the rectangular pasture is found to be 80,000 ft².
Explain the term Rectangle?A rectangular is a flat, two-dimensional object with four sides. A rectangle has two opposite sides that are parallel to one another and have the same length. A rectangle with the dimensions l and w has an area of l w. The rectangle's perimeter is 2(l + w).Given:
A rectangular pasture does have a 1200 foot circumference. The width of the meadow is 200 feet wider than its length.Let the pasture's rectangular length be l feet.
Given that the rectangular pasture's length being 200 feet longer than its breadth, its width must be w = l200 feet.
The pasture's boundary is;
2(l + w) = 1200
2(l + l - 200) = 1200
2l - 200 = 600
l = 400 feet
Width; w = l - 200
w = 400 - 200 = 200 feet
Rectangular area;
A = l x w
A = 400 x 200
A = 80,000 ft²
Thus, the area of the rectangular pasture is found to be 80,000 ft².
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A track and field team was calculating their long jump scores. The long jump teamates add up their scores to determine the best team. The current winning team has a combined score of 25.6 m. Alaina's teamates jumped the following jumps: 5.46m,4.84, 4.92 and 5.98m. What score would Alaina have to get to tie the Winning teams score? Show your work.
The score that Alaina will have to get to tie the Winning teams score is 4.4.
How to calculate the score?Given that the long jump teamates add up their scores to determine the best team. The current winning team has a combined score of 25.6 m.
Also, Alaina's teamates jumped the following jumps: 5.46m,4.84, 4.92 and 5.98m.
Therefore, Alaina's score to beat the other team will be:
= 25.6 - (5.46m + 4.84 + 4.92 + 5.98m)
= 25.6 - 21.2
= 4.4
Therefore, she must get 4.4 to tie.
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Jeffrey ate x ounces of M&M's. Priya ate 1/3 less than that. Which diagram matches that situation?
Jeffrey ate x ounces of M&M's. Priya ate 1/3 less than that. Which diagram matches that situation?
Option C
chien visits the park every 5 days and goes to the library every 6 days if chien does both of these today how many days will pass before chien gets to do both on the same day again
Answer:
30
Step-by-step explanation:
For this problem she goes to the park every 5 days so, 5,10,15,20,25,30 and so on and she goes to the library every 6 days so, 6,12,18,24,30,36 and so on. 30 is the GCF of both so that is the answer
25 POINTS PLS ANSWER WITH GIVE BRAINLY PPLEASE HELPP
The constant of proportionality for the given set of values of x and y is found as 1/2.
Explain the term constant of proportionality?The ratio connecting two given numbers in what is described as a proportional relationship is the constant of proportionality. Constant ratio, rate constant, unit rate, constant of variation, and even rate of change are other terms for the proportionality constant.As k = y/x, just use equation to determine k, the proportionality constant.We say that y changes directly as x or that y is inversely proportional the x if y = k x for some constant k. The proportionality constant for the connection is denoted by the integer k.For the given question,
The table for the two value of x and y are given below.
The value of constant of proportionality for every pair of values will be same.
Thus,
k = x/y
For x = 2 and y = 4
k = 2/4
k = 1/2
Thus, the constant of proportionality for the given set of values of x and y is found as 1/2.
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the term of a sequence is given. write the first four terms of the sequence. express the terms in simplified form when applicable.
The first four terms of the given sequence A(n)=4n^3+2 is 6, 34, 110, 258.
In the given question, the nth term of a sequence is given.
We have to write the first four terms of the sequence and we also have to express the terms in simplified form when applicable.
The given sequence is:
A(n)=4n^3+2
We find the four terms of the given sequence by putting n=1,2,3,4 in the given sequence.
Now putting n=1 in the given sequence
A(1)=4(1)^3+2
A(1)=4*1+2
A(1)=4+2
A(1)=6
Now putting n=2 in the given sequence
A(2)=4(2)^3+2
A(2)=4*8+2
A(2)=32+2
A(2)=34
Now putting n=1 in the given sequence
A(3)=4(3)^3+2
A(3)=4*27+2
A(3)=108+2
A(3)=110
Now putting n=1 in the given sequence
A(4)=4(4)^3+2
A(4)=4*64+2
A(4)=256+2
A(4)=258
Now the first four terms of the given sequence is 6, 34, 110, 258.
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The right question is:
The nth term of a sequence is given. Write the first four terms of the sequence. Express the terms in simplified form when applicable.
A(n)=4n^3+2
What does negative 4 over 7 > −2 indicate about the positions of negative 4 over 7 and −2 on the number line? (4 points) a is located on the right of −2, and −2 is located on the right of 0 b is located on the left of −2, and −2 is located on the right of 0 c is located to the right of −2 d is located on the left of −2
Answer: Negative 4 over 7 is located to the right of -2
In the number line, the numbers are written in ascending order or from left to right in increasing order,
That is if a < b, where a and b are any real number
⇒ b is located on the right side of an in the number line,
Here, given expression,
negative 4 over 7 > −2
That is,
⇒ Negative 4 over 7 is located to the right of -2
Step-by-step explanation:
Dylan divided 1/2 pound of butter into 4 equal parts. How much butter was in each part?
Mark as brainiest
Answer:
1/8 pounds
because half of 1/2 is 1/4 and half of that is 1/8 so into 4 eqaula parts ots would be 1/8
subtract $a-4$ from $4a 16$ and simplify your answer. the variable $a$ should appear only once in your answer.
The answer is (3a + 20) and also here variable ' a ' appears only once.
A linear expression is an algebraic expression in which each term is a constant or a variable raised to the first power. To put it another way, none of the exponents can be greater than 1.
[tex]x^2[/tex] is a variable raised to the second power, whereas x is a variable raised to the first power.
A linear expression is 2x - y + 3.
A constant is represented by the number, example 5.
Given,
expression (a - 4) and (4a + 16)
subtracting (a - 4) from (4a + 16), results in
= (4a + 16) - (a - 4)
= 4a + 16 - a + 4
=3a+20
Thus, the answer is (3a + 20), and variable 'a' appears only once.
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During an electronic store's Sale Days, the regular price of CD Players is discounted $10. There is a state sales tax of 5%, and the $10 discount is applied before the sales tax is calculated.
A. Write an expression that shows the regular price r of a CD Player minus the $10 discount.
B. Write a rule for the function p(r) that expresses the final price p of a CD Player with the discount applied and sales tax included
C. How much would you pay during Sale Days for a CD Player regularly priced at $29.50?
Answer:
A) r - 10
B) p(r) = 1.05(r - 10)
C) $20.48 (nearest cent)
Step-by-step explanation:
Part AIf r is the regular price of a CD player, then an expression for the regular price minus the $10 discount is:
r - 10Part BIf a state tax of 5% is applied to a sale, then the cost of the item will be 105% of its regular price. 105% expressed as a decimal is 1.05.
Therefore, we need to multiply the expression from part A by 1.05 to find the final price of the CD player:
p(r) = 1.05(r - 10)Part CTo calculate how much would you pay during Sale Days for a CD Player regularly priced at $29.50, substitute r = 29.5 into the function from part B:
⇒ p(r) = 1.05(29.50 - 10)
⇒ p(r) = 1.05(19.50)
⇒ p(r) = 20.475
Therefore, you would pay $20.48 (rounded to the nearest cent) for a CD Player during Sale Days.
If $10,000 is invested at x percent simple annual interest for n years, which of the following represents the total amount of interest, in dollars, that will be earned by this investment in the n years?
10,000n(x/100)
The reasoning is from the following:The formula for simple rate of interest is F = P(1+rt) whereF = future valueP = present valuer = ratet = time
If $10,000 is invested at x percent simple annual interest for n years, the total amount of interest would be F = 10,000n(x/100)
What do you understand by the term simple interest?Simple interest is a quick and straightforward technique to compute interest on money. In the simple interest method, interest always applies to the initial principle amount, with the same rate of interest for each time cycle. When we put our money in a bank, we receive x percent simple annual interest on it. Banks charge many kinds of interest, one of which is simple interest. Now, before delving further into the idea of simple interest, let's first define what a loan is.
A loan is an amount borrowed by a person from a bank or other financial institution to meet their requirements. Home loans, auto loans, student loans, and consumer lending were just few examples of loans.
How to solve?
F = P(1+rt), where Future value is F, Present value is P, Rate is R, Time is t
F = 10,000(1+xn)
F = 10,000(xn)
F = 10,000(n * x/100)
F = 10,000n(x/100)
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please help me with this. Ahhh sooon
Answer:
9x + 16
Step-by-step explanation:
When you are finding the perimeter of each shape, you are essentially combining all of the shape's side measurements together.
In this case, you are given a triangle, which has 3 sides. Add the 3 side's measurements together to obtain the perimeter of the given triangle.
P (Perimeter of triangle) = (3x + 10) + (3x) + (3x + 6)
Combine like terms. Like terms are terms that have the same variables:
P = (3x + 3x + 3x) + (10 + 6)
P = (9x) + (16)
P = 9x + 16
9x + 16 is your answer.
~
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The local movie theater charges $13 for adult tickets and $7 for children's tickets Yesterday they sold
115 tickets and made $943. How many adult and children tickets did they sell?
Answer:
23 adult tickets and 92 children tickets
Step-by-step explanation:
Answer:
he sold 23 adults tickets and 93 children
Step-by-step explanation:
To determine how American college students feel about commuting, 100 students at a private university were randomly chosen by selecting 50 men and 50 women to participate. They were asked how far they commute each day (in minutes) to campus.
The results of this survey are unreliable primarily because of
voluntary response bias
sampling bias
the absence of a control group
response bias
None of the above
The key reason why this investigation's findings are erroneous is sampling bias. In statistics, sampling bias refers to a bias during which a sample is constructed in a way that makes some members of the intended population less likely than others to be included.
A private university's 100 students, 50 men, and 50 women were randomly chosen to participate in a study on how American college students felt about commuting. They were questioned about their daily commuting distance (in minutes) to college. The key reason why this investigation's findings are erroneous is sampling bias.
When certain individuals of a population are consistently more likely to be chosen in a sample than others, this is known as sampling bias. In the medical sciences, it is also known as ascertainment bias. Because sampling bias jeopardizes external validity, particularly population validity, it restricts the generalizability of findings.
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a kayack guide took two hours to paddle 20 miles downstream with the current and four hours to paddle 16 miles upstream against the current. find the speed of the current and the average paddling speed
The speed of current and average speed of paddling is 3 and 7 respectively.
Let p represents paddling speed of kayack guide and c represents speed of current.
If paddling downstream, the total speed is p + c because you’re paddling with the current. Similarly, if paddling upstream, the total speed is p - c because you would be paddling against the current.
Since paddling downstream took 2 hours so distance covered 2*(p + c)
which is equal to 20 miles.
2*(p + c) =20.
p + c = 10. -----i
Paddling upstream took 4 hours so distance covered 4*(p-c).
which is equal to 16 miles.
4*(p-c) = 16.
p - c = 4. -------ii
adding both equation c will be cancelled. 2*p=14 p =7.
put value of p in equation i.
7 + c = 10 ,c = 3.
So the speed of current and average speed of paddling is 3 and 7 respectively.
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how many four-digit numbers greater than $2999$ can be formed such that the product of the middle two digits exceeds $5$?
A total of 4970 four-digit numbers that are greater than 2999 can be created so that the middle two digits' product is greater than 5.
Combinations are mathematical operations that count the number of possible combinations for a set of elements when the order of the selection is irrelevant. One can choose the components of combinations in any order. Here, we have to find four-digit number combinations.
The digit in the thousands place should be greater than 2 so that the four-digit number be will greater than 2999. So the possible numbers are 3, 4, 5, 6, 7, 8, and 9. Therefore, this occurs in 7 ways.
The digit in the one's place can be any number from 0 to 9. Therefore, this occurs in 10 ways.
For the middle two digits, the combinations are given by,
If the hundreds digit is 1 then, the tens digit can be 6, 7, 8, and 9. This occurs in 4 ways.
If the hundreds digit is 2 and the tens digit can be from 3 to 9. This occurs in 7 ways.
If the hundreds digit is 3 and the tens digit can be from 2 to 9. This occurs in 8 ways.
If the hundreds digit is 4 and the tens digit can be from 2 to 9. This occurs in 8 ways.
If the hundreds digit is 5 and the tens digit can be from 2 to 9. This occurs in 8 ways.
If the hundreds digit is 6 and the tens digit can be from 1 to 9. This occurs in 9 ways.
If the hundreds digit is 7 and the tens digit can be from 1 to 9. This occurs in 9 ways.
If the hundreds digit is 8 and the tens digit can be from 1 to 9. This occurs in 9 ways.
If the hundreds digit is 9 and the tens digit can be from 1 to 9. This occurs in 9 ways.
The total ways for the middle two digits are 4+7+8+8+8+9+9+9+9=71 ways.
Therefore, the total number of four-digit numbers greater than 2999 is 7×10×71=4970.
The answer is 4970.
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linear regression analysis calculated a slope of -0.017 and a y intercept of 39.11. what would be the predicated depression score if the mhpg level was 1100?
As per the linear regression analysis, the predicated depression score if the MHPG level was 1100 is 20.41
Linear regression analysis:
In math , linear regression analysis means a regression model that estimates the relationship between one independent variable and one dependent variable using a straight line.
Given,
linear regression analysis calculated a slope of -0.017 and a y intercept of 39.11.
Here we need to predict the depression score if the mhpg level was 1100.
We know the that standard form of the line of equation for straight line is written as,
y = mx + c
where m refers the slope and c refer the y intercept.
Then the line of the equation of this linear regression analysis is written as,
=> y = -0.017x + 39.11
In this equation x refers the MHPG level.
So, the value of x is 1100, then the predicated depression score is calculated as,
=> y = -0.017(1100) + 39.11
=> y = -18.7 + 39.11
=> y = 20.41
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If k is the midpoint of jl, jk=8x 11 and kl=14x-1, find jl
The value of the line segment jl is found as the 27 units.
Explain the term midpoint of the line segment?The center of a line segment is known as the midpoint. It represents the centroid of a segment and of its ends, and it is equally distant from both of them.The midpoint is really a point that lies on a line connecting two other locations and sits in the middle of it. The midpoint is the point on the middle position that is equally distant first from two points if a lines is drawn connecting the two points.For the given question.
jk = 8x + 11
kl = 14x - 1
K is the mid point of the line segment JL.
Thus,
jk = kl
Put the values-
8x + 11 = 14x - 1
14x - 8x = 11 + 1
6x = 12
x = 2
Thus, jl = 8x + 11
jl = 8(2) + 11
jl = 27
Thus, the value of the line segment jl is found as the 27 units.
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8(-2)^3 + (5) x 4^1
can you explain this is steps?
Answer: I did my best
Step-by-step explanation:
8(−2)3+5x41
Simplifies to:
5x4−64
=5x4−64
On September 12, Jody Jansen went to Sunshine Bank to borrow $2,300 at 9% interest Jody plans to repay the loan on January 27. Assume the loan is on ordinary interest: (Use Days in a year table) a. What interest will Jody owe on January 27? (Do not round intermediate calculations. Round your answer to the nearest cent:) Interest 866.00 2 decimal places required. b. What is the total amount Jody must repay at maturity? (Do not round intermediate calculations Round your answer to the nearest cent:) Maturity value 3,166.00 2 decimal places required.
Jody will be forced to repay a total of $2,377.69 when the loan matures.
Ordinary interest, commonly referred to as simple interest, is computed by dividing the annual marginal rate by the 365 days that make up a year. It does not take compounding into account.
The number of days can be calculated as follows:
19(Sep), 31(Oct), 30(Nov), and 31(Dec) add up to 111 days in year 1.
Second-year days: 26 (Jan)
137 days in total
Rate = 0.09 Principal = $2,300
time = 137 ÷ 365
Interest = 2300 × 0.09 × (137 ÷ 365) = $77.69
Amount due at maturity is $2,300 plus $77.69, for a total of $2,377.69.
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Suppose the original quantity is and the new quantity is . Estimate the percent change. Is this an example of a percent increase or a percent decrease?
There is percent decrease is 12%.
What is Percent decrease?The difference between starting and ending values is the percentage decrease. It displays a percentage loss of value compared to the original regardless of the units. The difference between the initial and final amounts is the amount of decrease.
Given:
original quantity is 100
new quantity is 88
So, change in quantity = 100-88= 12
and, percent decrease = 12 / 100 x 100 = 12%
Hence, there is percent decrease is 12%.
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