Question

What advertising medium gives a brand the most credibility in influencing brand​ decisions? According to a​ survey, 44% of Millennials point to TV. Complete parts​ (a) through​ (e).

a. To conduct a​ follow-up study that would provide 95% confidence that the point estimate is correct to within plus or minus 0.05± of the population​ proportion, how large a sample size is​ required?

b. To conduct a​ follow-up study that would provide 99​% confidence that the point estimate is correct to within plus or minus 0.05± of the population​ proportion, how many people need to be​ sampled?

c. To conduct a​ follow-up study that would provide 95​% confidence that the point estimate is correct to within plus or minus 0.02± of the population​ proportion, how large a sample size is​ required?

d. To conduct a​ follow-up study that would provide 99​% confidence that the point estimate is correct to within plus or minus 0.02± of the population​ proportion, how many people need to be​ sampled?

e. Discuss the effects of changing the desired confidence level and the acceptable sampling error on sample size requirements. Select all that apply.

A.The higher the level of confidence​ desired, the larger is the sample size required.

B.The smaller the level of confidence​ desired, the larger is the sample size required.

C.The smaller the sampling error​ desired, the smaller is the sample size required.

D.The higher the level of confidence​ desired, the smaller is the sample size required.

E.The higher the sampling error​ desired, the larger is the sample size required.

F.

The smaller the sampling error​ desired, the larger is the sample size required.

G.

There are no effects on the sample size requirements.

Answer 1

a) p= 0.44, E=0.05 and c=0.95

b)  p= 0.44, E=0.05 and c=0.99

c)  p= 0.44, E=0.02 and c=0.95

d)  p= 0.44, E=0.02 and c=0.99

A.The higher the level of confidence​ desired, the larger is the sample size required.

F. The smaller the sampling error​ desired, the larger is the sample size required.