1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lyudmila [28]
2 years ago
14

A random sample of adults were asked whether they prefer reading an e-book over a printed book. The survey resulted in a sample

proportion of p′=0.14, with a sampling standard deviation of σp′=0.02, who preferred reading an e-book. Use the empirical rule to construct a 95% confidence interval for the true proportion of adults who prefer e-books.
Mathematics
1 answer:
djyliett [7]2 years ago
8 0

Answer: (0.10\ ,\ 0.18)

Step-by-step explanation:

According to the empirical rule, the 95% confidence interval for the true population proportion is given by :-

(p'-2\sigma_{p'}\ ,\ p'+2\sigma_{p'})

Given : . The survey resulted in a sample proportion of p′=0.14, with a sampling standard deviation of σp′=0.02, who preferred reading an e-book.

Then, the 95% confidence interval for the true proportion of adults who prefer e-books will be :-

(0.14-2(0.02)\ ,\ 0.14+2(0.02))\\\\=(0.14-0.04\ ,\ 0.14+0.04)\\\\=(0.10\ ,\ 0.18)

Hence, the 95% confidence interval for the true proportion of adults who prefer e-books= (0.10\ ,\ 0.18)

You might be interested in
Simplify 8^2 /4+3.7(42.3-24.6)
Vaselesa [24]

Answer     B

Step-by-step explanation:

I did it and got 63.19

7 0
2 years ago
Read 2 more answers
Which shows one way to determine the factors of x3 – 12x2 – 2x + 24 by grouping?
xz_007 [3.2K]

Answer:

D. x^{2} (x-12) -2(x-12)

Step-by-step explanation:

Determine the groups: (x^{3}-12x^{2} ) - (2x+24)

Factor out terms: x^{2} (x-12) -2(x-12)

The -2 was factored out in the second group to ensure that both groups had

(x-12).

4 0
2 years ago
Read 2 more answers
Find the length of f
JulijaS [17]
The proportion is 1.75
3 0
2 years ago
From the parking lot at red hill shopping center the angle of the top of the hill is about 25 from the base of the hill the angl
eimsori [14]

Answer:

512 ft.

Step-by-step explanation:

From the parking lot at the Red Hill Shopping Center, the angle of sight (elevation) to the top of the hill is about 25. From the base of the hill you can also sight the top but at an angle of 55. The horizontal distance between sightings is 740 feet. How high is Red Hill? Show your subproblems.

Solution:

Let x be the distance from the base of the hill to the middle of the hill perpendicular to the height, let h be the height of the hill. Therefore:

tan 25 = h/(x + 740)

h = (x + 740)tan 25       (1)

tan 55 = h / x

h = x tan 55        (2)

Hence:

(x + 740)tan 25 = xtan 55

0.4663(x + 740) = 1.428x

0.4663x + 345.07 = 1.428x

0.9617x = 345.07

x = 359 ft.

h = xtan55 = 359 tan(55) = 512 ft.

8 0
2 years ago
I need help on #7<br> Please show your work
givi [52]

The area of the given square pyramid is:

total area = 1,100 inches squared.

<h3 /><h3>How to get the area of the pyramid?</h3>

On the second image, we can see that the pyramid is conformed of a square base and 3 triangles.

To get the surface area of the pyramid, we can just get the area of each of these simpler parts.

The base is a square of 22 in by 22 in, then the area of the base is:

B = (22in)*(22 in)  = 484 in^2

For each triangle, the area will be:

A = (base side)*(height)/2

A = (22in)*(14in)/2 = 154 in^2

And we have 4 of these triangles, then the total area of the pyramid will be:

total area = B + 4*A = 484in^2 + 4*(154 in^2) = 1,100 in^2

If you want to learn more about square pyramids:

brainly.com/question/22744289

#SPJ1

3 0
1 year ago
Other questions:
  • Stephen paid $340 for a $320 sofa. The extra amount was for tax. What was the percentage of tax for the sofa?
    9·1 answer
  • What doea the sum of the number mean?
    11·1 answer
  • Please please please please answer now and please please explain thank you so much so so so much
    8·1 answer
  • A company spent 32% of its annual budget developing a new machine. What fraction of the company's budget was spent developing th
    7·1 answer
  • Hey can someone help me!! in need of help!! ASAPPPP
    14·1 answer
  • What is 1111 * 1111?<br> it is my favorite math problem and 1111 is satisfying to say in chinese
    7·2 answers
  • Which of the following is equal to 2 -5 ?
    6·1 answer
  • 30 days were sunny out of 100 days. What fraction of the days were sunny? *
    8·2 answers
  • Which is the only state that uses to calculate its area
    9·2 answers
  • Maya wants to make a pyramid out of plaster for her social studies class. How much plasterdoes she need to make a rectangular py
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!