1.Humor in Television Ads.In the Journal of Advertising, the use of humor in television ads in the United States was compared with the use of humor in television ads in the United Kingdom.It was found that a substantially greater percentage of U.K. ads use humor.

a)Suppose that a random sample of 400 television ads in the United Kingdom reveals that 184 of these ads use humor.

i.What is the parameter?

ii.Find : _______________________________________________________________

iii.Construct a 95% confidence interval for this parameter.

iv.Interpret this confidence interval in the context of the problem.

b)Suppose a random sample of 500 television ads in the United States reveals that 132 of these ads use humor.

i.What is the parameter?

ii.Find : _________________________________________________________

iii.Construct a 95% confidence interval for this parameter.

iv.Interpret this confidence interval in the context of the problem.

c)Do the confidence intervals you computed in a) and b) suggest that a greater percentage of U.K.ads use humor?Explain.How might an ad agency use this information?

d)Determine the sample size needed in order to be 90% confident that the sample proportion of adsusing humor in the United States is within .04 of p.(based on the above approximation for p)

e)Determine the sample size needed in order to be 90% confident that the sample proportion of ads using humor is within 0.04 of p. (suppose you do not have an approximation for p)