Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

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Answer 1

Question

Chapter 13, Problem 45E

a.

To determine

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

b.

To determine

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

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Answer 2

Question

Chapter 13, Problem 45E

a.

To determine

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

b.

To determine

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

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Answer 3

Question

Chapter 13, Problem 45E

a.

To determine

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

b.

To determine

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

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Answer 4

Question

Chapter 13, Problem 45E

a.

To determine

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

b.

To determine

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

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Answer 5

Chapter 13, Problem 45E

a.

To determine

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

b.

To determine

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

Answer 6

Chapter 13, Problem 45E

a.

To determine

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

Answer 7

Chapter 13, Problem 45E

a.

To determine

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

Answer 8

b.

To determine

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

Answer 9

b.

To determine

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 13.2 - You want to poll a random sample of 100 students...Ch. 13.2 - Prob. 2JC Ch. 13.2 - If you think that about half the students are in...Ch. 13.3 - A Pew Research study regarding cell phones asked...Ch. 13.3 - Prob. 5JC Ch. 13.3 - A Pew Research study regarding cell phones asked...Ch. 13.3 - Prob. 7JC Ch. 13.3 - Prob. 8JC Ch. 13.5 - Prob. 9JC Ch. 13.5 - Prob. 10JC

Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

Solution Summary: The author explains that the 95% confidence interval for the proportion of 65 and older becomes wider and the margin of error decreases as the sample size increases.

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Explain whether the 95% confidence interval would be wider or narrower for the proportion of 65 and older than the 95% confidence interval for the true proportion of all Country U’s adults.

Explain whether the margin of error for the group which has 13% of 18-24 years old would be larger or smaller than the margin of error for the 65 and older group.

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Chapter 13 Solutions