A local school district wants to survey parental attitudes toward the proposed elimination of after-school sports as a cost-cutting move. Rather than send a questionnaire home with the students, the school committee decides to conduct a phone survey. Out of 120 parents questioned,74 supported the plan to cut the sports program.
a. Find the standard error of the proportion.
b. Find the 95% confidence interval for the population proportion.
c. Find the 99% confidence interval for the population proportion.