Question: A polling organization interviewed by phone 400 randomly selected fans about their opinion on random drug testing of professional baseball players and found that 68%

A polling organization interviewed by phone 400 randomly selected fans about their opinion on random drug testing of professional baseball players and found that 68% favored such a regulation.
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.

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