The President wants an estimate of the proportion of the entire US population who supports his position on gun control (or any policy). The President want the estimate to be within .035(3.5%)of the true proportion. Assume a 95% level of confidence.
A. How large a sample is needed?
b. Assume a 98% confidence level is wanted, what is the required sample size?
a. Sample size - proportion (95%)
0.035 E, error tolerance
0.5 estimated ...
The solution calculates the required sample size for a population estimation based on given levels of confidence.