Mathematics College

21.6 Computer use. A random sample of 197 12th-grade students from across the United States was surveyed, and it was observed that these students spent an average of 23.5 hours on the computer per week, with a standard deviation of 8.7 hours. If we plan to use these data to construct a 99% confident interval, the margin of error will be approximately (a) 0.07. (b) 0.62. (c) 1.6. (d) 8.7.

Answers

Answer 1

Answer:

Step-by-step explanation:

Calculation for what the margin of error will be approximately

First step is to calculate Total hours spent

Total hours spent = (197 * 23.5 hours)

Total hours spent =4,625 hours

Second step is to find the square root of the sample size

Sample size=√197

Sample size=14.04

Third step is to divide the Standard deviation of 8.7 hours by square root of sample size of 14.04

= 8.7 hours /14.04

= 0.6196

Fourth step is to use the Z table to find Z value at 99% confidence

Z value at 99% confidence = 2.58

Last step is to calculate the Margin of error

Margin of error = 0.6196 * 2.58

Margin of error = 1.59857

Margin of error= 1.6 (Approximately)

Therefore what the margin of error will be approximately is 1.6

Related Questions

What are the domain and range of the function represented by the set of
ordered pairs?
K(-10, -6), (-4, -10), (3, 8), (9, -2)}

Answers

Answer:

Step-by-step explanation:

Domain is the first number in the ordered pairs and range is the second number. (I'm sorry if it's wrong)

Hope it helps!

Write 0.37 as a percent.

Answers

Answer:

Step-by-step explanation:

Answer:

37%

Step-by-step explanation:

0.37 x 100 = 37%

Find the difference in SIMPLEST form:
3 1/5 - 1 1/10=

Answers

Answer:

2 1/10

Step-by-step explanation:

Answer:

2 1/10 or 2.1

Step-by-step explanation:

ANSWER ASAP PLEASE
If Jose drove 330 miles in 5.5 hours, how many miles did he drive per hour?

Answers

Answer:

60mph

Step-by-step explanation:

330 divided by 5.5 is 60

Georgia bought pears for $6.14. The price of pears is $1.10 per pound. How many pound of pears did she buy? (Round your answer to the nearest hundreths place. )

Answers

Answer:

5.58

Step-by-step explanation:

Please give me the correct answer

Answers

Your answer would be: 3 x 10^-5

Hope this helps and happy holidays!!

Solve for u

-5(-5u+5)-8u=5(u-5)-4

Answers

[tex] - 5( - 5u + 5) - 8u = 5(u - 5) - 4 [/tex]

[tex]25u - 25 - 8u = 5u - 25 - 4[/tex]

[tex]17u - 25 = 5u -29[/tex]

[tex]17u - 5u = - 29 + 25[/tex]

[tex]12u = - 4[/tex]

[tex]u = \frac{ - 4}{12} [/tex]

[tex]u = - \frac{1}{3} [/tex]

Plz i NEED HELP ABOUT TO FINISH THIS CLASS! PLZ
17. Does the following system have a unique solution? Why?

Answers

The last one quick quick

Answer:

last one

Step-by-step explanation:

please help me out!!

Answers

Step-by-step explanation:

Given

f(x) = 2x - 4

Then

f(2) = 2 * 2 - 4

= 4 - 4

= 0

Therefore f(2) = 0 .

Hope this helps :)

Eagle Sports Supply had net income of $2,000 on sales this year. The firm paid a dividend of $500 and retained the rest earnings for financing for the next year. Total assets were $100,000, of which $40,000 was financed by debt. The rest were financed by equity.

(a) What is the firm’s internal growth rate?
(b) What is the firm’s sustainable growth rate?
(c) If the firm grows at its sustainable growth rate, how much new debt will be issued in the next year?

Answers

Answer:

089908

Step-by-step explanation:

i dont know lol but wana see

Solve for x
4x + 188
6x+216

Answers

X=-14
Explanation is :

What is 0.612 repeating (meaning the repeating line is over 612) as a fraction

Answers

Answer:

[tex]\frac{612}{999}[/tex]

Step-by-step explanation:

To convert repeating decimals to fractions, you take the numbers that are repeating, in this case 612, and you see how many numbers are repeating. Here we have 3 numbers repeating and so you would divide 612 by 3 9's meaning 999. So 0.612 repeating is equal to [tex]\frac{612}{999}[/tex]. To make sure the answer is right, you can divide the numbers in a calculator to make sure you get the correct decimal.

I need help on a math problem on my homework

Answers

What’s the question

Answer: Where is the question?

Step-by-step explanation:

Len bought 12.3 ounces of cashews and 15.2 ounces of almonds.
He calculates that if he and four friends share all the nuts equally, each person will receive 5.1 ounces of nuts.

Is his answer reasonable? Use 3-5 complete sentences to explain why or why not.

Answers

Answer:A manufacturer produces nuts and bolts. It takes 1 hour of work on machine A and 3 hours on machine B to produce a package of nuts. It takes 3 hours on machine A and 1 hour on machine B to produce a package of bolts. He earns a profit of Rsl7.50

Step-by-step explanation:

Answer:

Lens answer is not reasonable because if you do the math she will be able to share 6.875 ounces. I know this because you can add 12.3 and 15.2 to get 27.5. If you divide 27.5 by 4 you get 6.875.

Step-by-step explanation:

Convert 4/16 to a decimal.
0.1
O
0.25
0.5
0.75

Answers

Answer:

0.25

How to Solve:

Take the denominator of 4/16 and find a number to make it 10, 100, any one followed by zeroes:

16 x 6.25 = 100

Do the same to the numerator:

4 x 6.25 = 25

Now, take 25 and take a decimal point two spaces to the right:

0.25

Fill in the blanks to solve the equation.
2 (2 – 14) = } (x – 12)
= {x – 4
N
-7 = -4
2=

Answers

answer: -24

explanation : i was able to solve it but i for got what numbers i used to solve it with

Select two ratios that are equivalent to 2:9

Choose 2 correct answers 40 points

Answers

Answer:

4:18 6:27 8:36

Step-by-step explanation:

Tell whether each sentence about the factors of of 12 is True or False.
A. Allthefactorsof12are2,3,4,6,12.
B. 1 and 12 are a factor pair.
C. 120isafactorbecause10x12=120.
D. An array showing the factor pair of 3 and 4 would have 3 rows of 4 objects.
☐ True ☐ True ☐ True ☐ True
☐ False ☐ False ☐ False ☐ False

Answers

Answer:

A. True, 1 is always a factor too but It wasn't included there

B. True

C. True

D. False, it makes no sense.

Step-by-step explanation:

Have a nice day

Identify the constant term in this expression 0.25 + 2x + 4z +0.75y
A) 2x B) 4x C 0.25 D) 0.75y

Answers

C) 0.25 is the answer because it has the lowest degree and doesn’t have a variable

Answer:

0.25..........................................................

in a packet or Skittles there are, 40 Skittles,30 are red how many Skittles are not red

Answers

Answer:

Step-by-step explanation:

hope this helps ")

SENDING CASHAPP TO WHOEVER GETS THIS RIGHT GL HURRY ONLY 1 PERSON!!!

Answers

Answer:

i think its b i dont have a cash app discord nitro will do jk its free idc

Step-by-step explanation:

Answer:

Step-by-step explanation:

an isosceles triangle has 2 sides the same and 1 side a different length no need to pay me :)

HELP ME PLEASE!!!
On a scale drawing of a house, the dimensions of the living room are 4 inches by 3 inches. If the scale drawing is 1 in: 6 ft , find the actual length and width of the living room.

Answers

Answer:

The width is 18

Step-by-step explanation:

6x3 and get 18 as the width

The ratio of gifts wrapped in red to gifts wrapped in green is 3:5. If there are 32 total gifts, how many of each are wrapped in red? In green?

Answers

Answer:

Step-by-step explanation:

This is probably pretty late, but I'll do it anyway.

There are 8 parts all together.

3x + 5x = 32 Combine the terms on the left.

8x = 32 Divide by 8

8x = 32/8

x = 4

Therefore the red gifts are 3*4 = 12

The green gifts are 5*4 = 20

Total 32 Just as it should

Help
Fjdjdjdjdjdjdjdjdjjd

Answers

Answer:

D. -2/5

Step-by-step explanation:

D. -2/5
Hope this is correct. Have a great day!

n ÷ -6 = 4 - (-2)

-12

36

-36

12 ********************************

Answers

Answer:12

Step-by-step explanation:

;)88):4?8’kifssvjimdargyjkk

Which polynomial represents the product of 2x - 4 and x2 + 6x - 2 ?
ОА
2x3 + 8
thing
B
2x3 + 8x2 - 4x + 8
с
2x3 + 8x2 - 28x + 8
D
2x3 - 24x - 2

Answers

Answer:

C. [tex] 2x^3 + 8x^2 - 28x + 8 [/tex]

Step-by-step explanation:

Product of [tex] 2x - 4 [/tex] and [tex] x^2 + 6x - 2 [/tex]

[tex] (2x - 4)(x^2 + 6x - 2) [/tex]

[tex] 2x(x^2 + 6x - 2) -4(x^2 + 6x - 2) [/tex] (distributive property)

[tex] 2x^3 + 12x^2 - 4x -4x^2 - 24x + 8 [/tex]

Collect like terms

[tex] 2x^3 + 12x^2 - 4x^2 - 4x - 24x + 8 [/tex]

[tex] 2x^3 + 8x^2 - 28x + 8 [/tex]

Joey wants to paint this side of his cottage. What is the area of this side?

A. 56 square feet
B. 238 square feet
C. 294 square feet
D. 462 square feet

Answers

Answer:

238 B

Step-by-step explanation:

8.5*28

What is the quotient of Three-fifths and StartFraction 1 Over 10 EndFraction?

A number line going from 0 to 1 in increments of 0.2.
One-sixth
One-third
3
6

Answers

Answer:

D:6

Step-by-step explanation:

3/5 = 6/10

6/10 divided by 1/10 equals 6

so 6 is your answer.

Answer:

Step-by-step explanation:

Find the location of A' given that A is (7, 1).
Translate 1 unit left.
The location of A' is ____

Answers

Answer:

We conclude that the location of A' is: A'(6, 1)

Step-by-step explanation:

Given

A(7, 1)

To determine:

The location of A'

Translation Rule:

As we have to translate 1 unit left, meaning we need to subtract 1 unit from the x-coordinate of point A(7, 1) to determine the location of A'.

In other words, the translation rule is:

A(x, y) → A'(x-1, y)

A(7, 1)

A(7, 1) → A'(7-1, 1) = A'(6, 1)

Therefore, we conclude that the location of A' is: A'(6, 1)

Write an equation of a line that is parallel to y = x - 7 and passes through the point (-6, -11).

Answers

Answer:

y = x - 5

Step-by-step explanation:

Comparing the given y = x - 7 to y = mx + b, we see that the slope is +1.

In y = x + b we replace y with -11 and x with -6 to determine the y-intercept, b:

-11 = -6 + b

Then b must be -5, and so the desired new equation is

y = x - 5

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