NEED A REAL ANSWER PLEASE, DO NOT ANSWER JUST FOR POINTS A researcher expects the population proportion of Cubs fans in Chicago to be 80 percent. The researcher wishes to have an error of less than 5 percent and to be 95 percent confident of an estimate to be made from a mail survey. What sample size is required? (show your full calculations)
Z = 1.96

E = 0.05

p = 0.8

q = 0.20