The shares of the US. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler. and other manufacturers were, respectively, 35%, 21%, 25%, 12%. and 7%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies: GM Japanese Ford Chrysler Other 386 256 289 65 10 Click here forthe Excel Data File (a) Show that it is appropriate to carry out a chi-square test using these data. Each expected value is 2 _ (b) Determine whether the current market shares differ from those of 1990. Use a = .05. (Round your answer to 3 decimal places.) H0. Conclude current market shares from those of 1990. Last rating period, the percentages of viewers watching several channels between 11 pm. and 11:30 pm. in a major TV market were as follows: WDUX \ MTY WACD WTJW (News) (News) (Cheers Re runs) (News) Others 1295 2395 2695 1895 21% Suppose that in the current rating period, a survey of 2,000 viewers gives the following frequencies: WDUX \ MTY WACO WTJW (News) (News) (Cheers Re runs) (News) Others 244 385 492 355 524 Click here for the Excel Data File (a) Show that it is appropriate to carry out a chi-square test using these data. Each expected value is 2 _ (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.) *9 n