A reporter wants to gauge the opinion of college undergraduates about legalizing marijuana,
a) Using p_n = 0.65 (from a similar study), and a 95% confidence level, determine what the sample size is for a margin of error of 5%.
b) Using p_n = 0.5 (from a similar study), and a 95% confidence level, determine what the sample size is for a margin of error of 5%.
c) Using p_n = 0.65 (from a similar study), and a 95% confidence level, determine what the sample size is for a margin of error of 1%.
d) Using p_n = 0.5 (from a similar study), and a 99% confidence level, determine what the sample size is for a margin of error of 1%.