In a certain region, 24% of people over age 50 didn't graduatefrom high school. We would like to know if this percentage is thesame among the 25-30 year age group. Use critical values to exactly3 decimal places.
(a) How many 25-30 year old people should be surveyed in order toestimate the proportion of non-grads to within 6% with 99%confidence?
(b) Suppose we wanted to cut the margin of error to 2%. How manypeople should be sampled now? Â
(c) What sample size is required for a margin of error of3%? Â
