Question

In an article in the Joumal of Adverdising, Weinberger and Spotts compare the use of humor in television ads in the United States and in the United Kinadom. Suppose that independent random samples of teilevision ads are taken in the two countries. A random sample of 400 television ads in the United Kingdom reveals that 140 use humor, while a random sample of 500 television ads in the United Stanes reveals that 128se humor (a) Set up the null and atemative hypotheses needed to determine whether the proportion of ads using humor in the United Kingdom differs from the proportion of ads using humor in the United Stae Bo0 b) Test the hypotheses you set up in part a by using oritical values and by setting 7 equal to.10, 05,01, and.001 How much evidence is there that the proportions of U.K. and U.S. ads using humor are dffeet Round the proportion values to 3 declmal places. Round your answer to 2 decimal places) 29747 H at each value of 2 veystrengeviden (e) Set up the hypotheses needed to attempt to establish that the diflerence between the proporsons of U.K. and U.S. ads using humor is more than 05 (ve perentage points). Test these hypotheses by using a p value and by setingequal to.10, 05, 01, and.001.How much evidence is there that the diference between the proporsions excseds 057 (Round the proportion values to 3 decimal places. Round your value to 2 decimal places and p-value to 4 decimal places 29747 00029 Dent Ho at each value of 7 10 and 706 yevidene (d) Caloulane a 95 percent confidence interval for the difference between the proporion of U.X ads using humor and the proportion of U.S. ads using humor, Interpret this interval. Can we be 95 percent conident the proportion of U.K ads using humor is greater than the proportion of U.S.ads using humor? (Round the proportion values to 3 decimal places. Round your answers to 4 decimal places. 0.03210.159 90% of Confidence Interval the enire Interval is above zero

Answer 1

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