The shares of the U.S. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler, and other manufacturers were, respectively, 34%, 27%, 18%, 13%, and 8%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies: GM Japanese Ford Chrysler Other 390 241 192 81 96 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 HD. Conclude current market shares from those of 1990.

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The shares of the U.S. automobile market held in 1990 by General Motors, Japanese manufacturers, Ford, Chrysler, and other
manufacturers were, respectively, 34%, 27%, 18%, 13%, and 8%. Suppose that a new survey of 1,000 new-car buyers shows the
following purchase frequencies:
GM Japanese Ford Chrysler Other
390
241
192
81
96
picture Click here for the Excel Data File
(a) Show that it is appropriate to carry out a chi-square test using these data.
es
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
HO. Conclude current market shares
from those of 1990.
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%, 27%, 18%, 13%, and 8%. Suppose that a new survey of 1,000 new-car buyers shows the following purchase frequencies: GM Japanese Ford Chrysler Other 390 241 192 81 96 picture Click here for the Excel Data File (a) Show that it is appropriate to carry out a chi-square test using these data. es 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 HO. Conclude current market shares from those of 1990.
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