Question 1
A population proportion is to be estimated from the sample described. Approximate the 95% confidence interval. Round your answer to four decimal places, if necessary.
A poll of 1300 voters in one district showed that 55% of them would favor stricter gun control laws. Find the 95% confidence interval for the population proportion favoring stricter gun control laws.
◦ 0.5492 < p < 0.5508
◦ 0.5224 < p < 0.5776
◦ 0.5223 < p < 0.5777
◦ 0.5305 < p < 0.5695
Question 2
A population proportion is to be estimated from the sample described. Approximate the 95% confidence interval. Round your answer to four decimal places, if necessary.
A medical researcher wishes to estimate what proportion of babies born at a particular hospital are born by Caesarean section. In a random sample of 144 births at the hospital, 29% were Caesarean sections. Find the 95% confidence interval for the population proportion.
◦ 0.2144 < p < 0.3656
◦ 0.2365 < p < 0.3435
◦ 0.2067 < p < 0.3733
◦ 0.2837 < p < 0.2963
Bell Curve for Intelligence IQ scores for a population-based sample usually fall into this kind of
Rural versus Urban Population, 1820–1860
Sample Program for Changing Daily Caloric Intake (cont.)
Sample inventory order form.
Sample Advance Directive Cont.
Sample of a weekly bookkeeping ledger.