Question

Volunteering: The General Social Survey asked 1299 people whether they performed any volunteer work during the past year. A total of 528 people said they did. al. Part 1 of 3 (a) Find a point estimate for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places. The point estimate for the proportion of people who performed volunteer work during the past year is 0.4065 Part: 1/3 Part 2 of 3 (b) Construct a 99% confidence interval for the proportion of people who performed volunteer work during the past year. Round the answer to at least three decimal places. A 99% confidence interval for the proportion of people who performed volunteer work during the past year is <p<0.

Answer 1

Solutions a Gren! X= 528 n= 1299 - 250.0) Z4/2=Z0.0052 2.576- from table point estimate of the populatim pre por tions p = x = 528 1299 + TE suitset / 2 = 0.4065 The point estimate of the proportion of people performed volunteer work during the past year is 10.4065) to tult haboos construct 99% confidence interval for 20 population proportion. 01 ( + 2y ✓ Proa =(0.40652.576 V0.4065(1-0.4065) 1299 = 0.40655 0.0351) =(0.3714, 0.4416) A g9t confidence interval for the puportion of people who performed volunteer work during the past year is 0.3714 <p20.4416