who have heard of the brand How many adults must he survey in order to be 80 confident that his estimate is within eight percentage points of the true ager for a brand of toothpaste must plan a campaign designed to increase brand recognition He wants to first determine the percentage of aduits population percentage Complete parts a through c below CELE b Assume that a recent survey suggests that about 78 of adults have heard of the brand Points 0 67 of 1 n 44 Round up to the nearest integer c Given that the required sample size is relatively small could he simply survey the adults at the nearest college of 13 points OA No a sample of students at the nearest college is a cluster sample not a simple random sample so it is very possible that the results would not be representative of the population of adults OB Yes a sample of students at the nearest college is a simple random sample so the results should be representative of the population of adults O C No a sample of students at the nearest college is a stratified sample not a simple random sample so it is very possible that the results would not be representative of the population of adults Save O D No a sample of students at the nearest college is a convenience sample not a simple random sample so it is very possible that the results would not be representative of the population of adults