During the last week of the semester, students at a certain college spend on the average 4.2 hours using the school’s computer terminals with a standard deviation of 1.8 hours. For a random sample of 36 students at that college, find the probabilities that the average time spent using the computer terminals during the last week of the semester is a) At least 4.8 hours (Draw the bell curve) b)

Answers

Answer 1

Answer:

0.97725

Step-by-step explanation:

Given :

Population mean, μ = 4.2

Population standard deviation, σ = 1.8

Sample size, n = 36

Obtain the Zscore of x = 4.8

Zscore = (x - μ) ÷ (σ / √n)

Zscore = (4.8 - 4.2) ÷ (1.8 / √36)

Zscore = 0.6 ÷ 0.3

Z = 2

Hence,

P(Z ≤ 2)

Using the Z probability calculator :

P(Z ≤ 2) = 0.97725


Related Questions

A new factory in a small town has an annual payroll of ​$ million. It is expected that of this money will be spent in the town by factory personnel. The people in this town who receive this money are expected to spend of what they receive in the​ town, and so on. What is the total of all this​ spending, called the total economic impact of the​ factory, on the town each​ year? Use the formula for the sum of an infinite geometric series.

Answers

Answer:

I would say a millions dollars!

Step-by-step explanation:

The graph of F(x) below resembles the graph of G(x) = x?, but it has been
changed somewhat. Which of the following could be the equation of F(x)?
Fix) =>
Gix) = x2
A. F(x) - x-2
B. F{X) = 4x2+2
C. Fx) = - - 2
D. FN-4222

Answers

Answer:

B. f(x) = 4x² + 2

Step-by-step explanation:

f(x) = 4 (x - 0)² + 2

vertex: (0 , 2) with vertical stretch

Someone help PLEASE thanks

Answers

Answer:

Utiliza la regla

Step-by-step explanation:

Y te sacarasb10

A wading pool is 2 m long and 5 m wide. If it holds 30 cubic meters of water, how deep is this wading pool?

Answers

Answer:

It would have to be 3 m deep

Step-by-step explanation:

2x5xy=30

2x5x3=30

If you go to sleep at 8:25 p.m. and wake up at 6:15 a.m. for how long did
you sleep?

Answers

If you sleep at 8:25pm and wake up at 6:15am you slept for 9hrs and 45 minutes.

Estimate the difference by rounding each number to the nearest hundredth 0.069-0.044

Answers

Answer:

0.1 and 0 thats the answer

Find the volume. No links please

Answers

Answer:

72 centimeters

Step-by-step explanation:

V=bh or l*w*h

V=6*3*4 = 72 cm

Use the graph of y=f(x) in the figure to estimate:

f(0)≈
f(1)≈
f(b)≈
f(c)≈
f(d)≈

Answers

9514 1404 393

Answer:

f(0) ≈ 22f(1) = 10f(b) ≈ -8f(c) = 0f(d)  24

Step-by-step explanation:

This takes graph-reading one step further. You get to estimate the y-value without benefit of minor grid lines. You must mentally divide the 10-unit distance between grid lines into equal spaces. Then estimate how many of those spaces lie between the point and the nearest grid line.

You can do this more precisely by drawing a diagonal line across the grid from one major grid intersection to one that is (5, 1) or (5, -1) major grid points away. Where that line crosses the intermediate grid lines, the vertical measure will be some multiple of 1/5 of the vertical difference between grid points. For example, a line from (0,20) to (5,30) will cross at (1,22), (2,24), (3,26), and (4,28). You can use these reference points to identify the y-values at f(0) and f(d).

Here's our eyeball estimate:

f(0) ≈ 22f(1) = 10f(b) ≈ -8f(c) = 0f(d)  24

Who is Pemdas Orelse?

Answers

It’s something with math!

Answer:

Pemdas is a lesson in Mathematics.

Step-by-step explanation:

What is the meaning of Pemdas?

The operations is rule that tells the correct sequence of steps by step for explanation's math expression.

Meaning of each letter in Pemdas?

Pemdas means each letter are Parenthesis, Exponent, Multiplication, Division, Subtraction, and Addition.

(ʋ◕ᴥ◕ʋ)

Find the volume of the solid figure shown below. The area of the base is 40 square inches, and the height of the figure is 7 inches. 280 in. 3 68 in. 3 47 in. 3 108 in. 3

Answers

Answer:

280in

Step-by-step explanation:

Answer:

280 in. ^3

Step-by-step explanation:

40 x 7

The length of a rectangle exceeds its width by
3 inches, and the area is 108 square inches.
What are the length and width of the
rectangle?

Answers

l=36in

width = 12in

there's ur answer

A random sample of 10 employees of a company was selected to estimate the mean one-way commute time for all employees at the company. The mean and standard deviation of the sample were 38 minutes and 6 minutes, respectively. Assuming all conditions for inference are met.

Required:
What is the margin of error, in minutes, for a 95 percent confidence interval for the population mean one-way commute time?

Answers

Answer:

The margin of error is of 4.22 minutes.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 10 - 1 = 9

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 9 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.2622

The margin of error is:

[tex]M = T\frac{s}{\sqrt{n}}[/tex]

In which s is the standard deviation of the sample and n is the size of the sample.

We have that [tex]s = 6, n = 10[/tex]. So

[tex]M = T\frac{s}{\sqrt{n}} = 2.2622\frac{6}{\sqrt{10}} = 4.22[/tex]

The margin of error is of 4.22 minutes.

By visual inspection, determine the best fitting regression model for the scatter plot

Answers

Answer

Exponential

Step-by-step explanation:

SHOW YOUR WORK

2 1/2 times ? = 5/8

Answers

Answer:

1/4

Step-by-step explanation:

Well 2 1/2 is the same thing as 5/2

so we do

5/2 * x(unknown number) = 5/8

2 * 5/2 = 5 * 2/8

5x = 5/4

x = 1/4

Which angles are pairs of corresponding angles? Check all that apply.
1/2
4 3
516
87
9 110
12111
13/14
16/15
1 and
3

Answers

Answer: The pair of corresponding angles are ∠2 and ∠14 , ∠3 and ∠7 . Option (B) and (D) is correct . When two lines are parallel to each other and cross by another line i.e is called the Transversal , the angles lies in the matching corners are called corresponding angles.

hope it helps!!

From the options given, the angles that are pairs of corresponding angles given in the image are:

∠2 and ∠14 ∠3 and ∠7

What are Corresponding Angles?

Corresponding angles will always lie on the same transversal and occupy the same relative position on the two different parallel lines that are intersected by the transversal.

Therefore, from the options given, the angles that are pairs of corresponding angles given in the image are:

∠2 and ∠14 ∠3 and ∠7

Learn more about corresponding angles on:

https://brainly.com/question/2009183

I will give you Brainiest if you are right.

Answers

Just add the polynomials or combine like terms and you gets 3x+6

Answer:

C. 3x + 6

Step-by-step explanation:

x + x + x + 1 + 1 + 1 + 1 + 1 + 1 + (-1) + (-1) =

= 3x + 6

Answer: C. 3x + 6

Find the measure of each numbered angle or are.

Answers

Answer:

<2 = 133degrees

<1 = 135degrees

Step-by-step explanation:

From the diagram, the angle <2 and 47 are supplementary, hence;

<2 + 47 = 180

<2 = 180 - 47

<2 = 133degrees

To get <1;

47 = 1/2(<1 - 41)

47 * 2 = (<1 - 41)

94 = <1 - 41

<1 = 94 + 41

<1 = 135degrees

Let H(x) = 5 x 2 - 10 x. Find x such that (x, - 5 ) is on the graph of H(x).

Answers

9514 1404 393

Answer:

  x = 1

Step-by-step explanation:

The equation in vertex form is ...

  H(x) = 5(x^2 -2x) = 5(x^2 -2x +1) -5

  H(x) = 5(x -1)^2 -5

The only value of x that will make H(x) = -5, is x=1.

20 points and brainly ;) You earned $1600 in interest in your savings account over 10 years at a rate of 8%. How much money did you originally deposit into your savings account?

Answers

A = p(1+r)^t

1600 = p(1+0.08)¹⁰

P = 1600/2.1589

P= 741.12

741.12 dollar money did you originally deposit into your savings account!

Solve for x

Please I need help

Answers

Answer:

x=25

Let's solve your equation step-by-step.

3x+18=93

Step 1: Subtract 18 from both sides.

3x+18−18=93−18

3x=75

Step 2: Divide both sides by 3.

3x/ 3 = 75/ 3

x=25

Answer:

x=25

Find the quotient of 3 2/5 ÷ 4 1/3
Give your answer as a fraction in its simplest form.​

Answers

Answer:

51/65

Step-by-step explanation:

3 2/5 ÷ 4 1/3 = 51/65

51/65 is in its simplest form.

Hope this helps! :)

The value of the quotient 3 2/5 ÷ 4 1/3 is 51/65

How to evaluate the quotient?

The quotient is given as:

3 2/5 ÷ 4 1/3

Convert the fractions to improper fractions

17/5 ÷ 13/3

Express as products

17/5 * 3/13

Multiply

51/65

Hence, the value of the quotient 3 2/5 ÷ 4 1/3 is 51/65

Read more about quotient at:

https://brainly.com/question/629998

#SPJ6

need ko na po this now

please answer this question

thank you po​

Answers

Answer:

B.

Step-by-step explanation:

what is 0.598 to the nearest whole number.

Answers

The answer is 1.

Answer: 1.

Answer:

1 I'm pretty sure

Step-by-step explanation:

59 is bigger than 50 so Im guessing it would go up to 1

I hope this helps :3

Simplify:
-43-(27)
A:70
B:16
C:-16
D:-70​

Answers

Answer:

The answer will be D

yoo please help me out

Answers

Answer:

70

Step-by-step explanation:

The answer is 187
U do 17 x 22 divided by 2 equals 187

Answer this simple quick question!! Pls :) m

Answers

Answer:

Answer is B!

Step-by-step explanation:

58 * 20 = 1160

0+160= 160

160+1000=1160

Answer:

B

Step-by-step explanation:

58 * 20 is 1160 and 0 + 160 + 1000 = 1160

i need help please help me

Answers

Answer: D

Step-by-step explanation:

It shows the bar going left, meaning its going higher, and we only marked 2

Answer:

2 < x

Step-by-step explanation:

There is an open circle at 2, which means it is not equal to

The line goes to the right which means it is greater tha

x> 2

or 2 < x

What is the common difference of the arithmetic sequence graphed below?
GO
an
1.
-11
1
2
3
4
5
6
7
8
9
n
-2
-3
4
5
-6
• (1.-3.75)
• (2, -4.5)
(3, -5.25)
• (4, -6)
(5.-6.75)
(6.-7.5)
• (7.-8.25)
• (8, -9)
-7
-8
-9
-10

Answers

9514 1404 393

Answer:

  -0.75

Step-by-step explanation:

If the difference is common, it is the difference of any pair of adjacent y-values (for sequential x-values).

  -4.5 -(-3.75) = -0.75 . . . . . difference between the first two y-values

The common difference is -0.75.

What is the value of the expression below? 6 - 11

Answers

Answer:

[tex]{\boxed{\boxed{\tt { ᶛɲƧཡэʀ :-}}}} \ [/tex]

[tex]6 - 11 \\ = - 5[/tex]

Answer:

-5 is your answer

have a nice day

(10^7)^2 as a single exponent

Answers

(10^7)^2
The answer = 10^14
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