ch 15 end. 1: The shares of the U.S. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler, and other manufacturers were, respectively, 34%, 28%, 20%, 13%, and 5%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies:

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ch 15 end. 1: The shares of the U.S. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler, and other manufacturers were, respectively, 34%, 28%, 20%, 13%, and 5%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies:

 

 

The shares of the U.S. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler, and other
manufacturers were, respectively, 34%, 28%, 20%, 13%, and 5%. Suppose that a new survey of 1,000 new-car buyers shows the
following purchase frequencies:
GM
Japanese
Ford
Chrysler
Other
363
200
251
107
79
picture 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 current market shares differ from those of 1990. Use a = .05. (Round your answer to 3 decimal places.)
x^2
Transcribed Image Text:The shares of the U.S. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler, and other manufacturers were, respectively, 34%, 28%, 20%, 13%, and 5%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies: GM Japanese Ford Chrysler Other 363 200 251 107 79 picture 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 current market shares differ from those of 1990. Use a = .05. (Round your answer to 3 decimal places.) x^2
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