In an article in the journal of advertising, weinberger and spotts compare the use of humor in television ads in the united states and the united kingdom. they 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 142 of these ads use humor. find a point estimate of and a 95 percent confidence interval for the proportion of all u. k. television ads that use humor. (round your answers to 3 decimal places.) pˆ = the 95 percent confidence interval is [ , ]. (b) suppose a random sample of 500 television ads in the united states reveals that 122 of these ads use humor. find a point estimate of and a 95 percent confidence interval for the proportion of all u. s. television ads that use humor. (round your answers to 3 decimal places.) pˆ = the 95 percent confidence interval is [ , ]. (c) do the confidence intervals you computed in parts a and b suggest that a greater percentage of u. k. ads use humor? , the u. k. 95 percent confidence interval is the maximum value in the confidence interval for the u. s. referencesebook & resources