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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 387 television ads in the United Kingdom reveals that 131 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.)   

  = The 95 percent confidence interval is [ , ].  

(b) Suppose a random sample of 493 television ads in the United States reveals that 134 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.)

  = 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.

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