The shares of the US. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler, and other manufacturers were, respectively, 38%,29%,19%,10%, and 4%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies: Bricture Gisk here for the Excel Dota. File (a) Show that it is appropriate to carry out a chi-square test using these data. (b) Determine whether the current market shares differ from those of 1990. Use =.05. (Round your answer to 3 decimal places.)