Procter & Gimple Soap Corp. need to know the advertising medium that gives a brand the most credibility in influencing brand decisions? According to a 2 year old census of the population, 41% of Millennials indicated that TV was best. Complete parts (a) through (e).
a. sample size needed to 95% confidence interval and margin of error of +/- 0.09.
b. the sample size needed for 99% confidence interval and margin of error of +/- 0.09.
c. Find the sample needed to construct the 95% confidence interval with a margin of error os +/- 0.09.
d. Find the sample size needed to construct the 99% confidence interval with a margin of error of +/- 0.09.
. Discuss the effects of changing the desired confidence level and the acceptable sampling error on sample size requirements. Select all that apply.