In a recent survey of new car buyers, 156 of 200 randomly selected buyers of Japanese made cars expressed “complete satisfaction “with their purchase. 105 of 150 randomly selected buyers of Korean made cars expressed “complete satisfaction.“
a. Use the normal sampling distribution of the sample proportion difference to test the hypothesis that there is no difference in the proportion of “completely satisfied“ customers in the Japanese car buyer population and the Korean car buyer population. Use a significance level of 5%.
b. Use the chi square distribution to test the hypothesis in part a. Compare your results to the results you produced in part a.
c. Construct a proper table to test the hypothesis in part b. Compare your results here to your results in parts a and b.

  • CreatedJuly 16, 2015
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