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## Procter & Gimple Soap Corp, need to know the advertising medium that gives a brand the most credibility in influencing brand decisions?

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.**