Last rating period, the percentages of viewers watching several channels between 11 P.M. and 11:30 P.M....

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Last rating period, the percentages of viewers watching severalchannels between 11 P.M. and 11:30 P.M. in a major TV market wereas follows: WDUX (News) WWTY (News) WACO (Cheers Reruns) WTJW(News) Others 15% 21% 25% 17% 22% Suppose that in the currentrating period, a survey of 2,000 viewers gives the followingfrequencies: WDUX (News) WWTY (News) WACO (Cheers Reruns) WTJW(News) Others 280 401 504 354 461
(a) Show that it is appropriate to carry out a chi-square testusing these data. Each expected value is ?
(b) Test to determine whether the viewing shares in the currentrating period differ from those in the last rating period at the.10 level of significance. (Round your answer to 3 decimal places.)?2 ? 2 H0. Conclude viewing shares of the current rating periodfrom those of the last.

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aObserved FrequenciesWDUX News280WWTV News401WACO Cheers Reruns504WTJW News354Others461Expected FrequenciesWDUX News2000X15100300WWTV News2000X21100420WACO Cheers See Answer

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