Volunteering:The General Social Survey asked

1302

people whether they performed any volunteer work during the past year. A total of

525

people said they did.

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(a) Find a point estimate for the population proportion of people who performed volunteer work in the past year. Round the answer to at least three decimal places.

The point estimate for the proportion of people who performed volunteer work in the past year is

233233

.

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(b) Construct a

99.9%

confidence interval for the proportion of people who performed volunteer work in the past year. Round the answers to at least three decimal places.

A

99.9%

confidence interval for the proportion of people who performed volunteer work in the past year is

3

<<p

3

.

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Part 3 of 3

(c) A sociologist states that

49%

of Americans perform volunteer work in a given year. Does the confidence interval contradict this statement? Explain.

The confidence interval (Choose one) contradict the claim, because

0.49

(Choose one) contained in the confidence interval.