Most Americans love participating in or at least watching sporting events. Some feel that sports have more than just entertainment value. In a survey of 1000 adults, conducted by KRC Research & Consulting, 78% felt that spectator sports have a positive effect on society.
a. Find a 95% condence interval for the percentage of the public that feel that sports have a positive effect on society.
b. At 95% condence, find the smallest sample size needed to obtain the mostconser-vativecondence interval with a margin of error of 0.01.