The shares of the US. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler. and other manufacturers were, respectively, 35%. 21%. 2596,1296, and 7%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies: GM Japanese Ford Chrysler Other 380 256 289 65 10 Click here for the Excel Data File (a) Show that it is appropriate to carry out a chisquare test using these data. Each expected value is 2 I (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