ast rating period, the percentages of viewers watching several channels between 11 p.m. and 11:30 p.m. in a major TV market were as follows:   WDUX (News) WWTY (News) WACO (Cheers Reruns) WTJW (News) Others 17% 24% 22% 15% 22%   Suppose that in the current rating period, a survey of 2,000 viewers gives the following frequencies:   WDUX (News) WWTY (News) WACO (Cheers Reruns) WTJW (News) Others 348 413 476 331 432      Click here for the Excel Data File   (a) Show that it is appropriate to carry out a chi-square test using these data.           (b) Determine whether the viewing shares in the current rating period differ from those in the last rating period at the .10 level of significance. (Round your answer to 3 decimal places.)

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