It is reported that 70% of car buyers who recently purchased Japanese-made cars were "extremely satisfied" with their purchase, 15% were "somewhat satisfied," 10% were "somewhat unsatisfied," and the rest were "extremely unsatisfied." In a random sample of 100 recent buyers of American-made cars, most said they were "extremely satisfied" with their purchase, some said they were "somewhat satisfied," others said they were "somewhat unsatisfied," and the rest said they were "extremely unsatisfied." You conduct a chi-square goodness-of-fit test using these sample results to test a null hypothesis that the population of recent American car buyers has the same satisfaction levels regarding their purchase as recent Japanese car buyers.The significance level for the test is 5%. If the p-value for the test turns out to be .0329, what should you conclude?
A)The sample results "fit" the Japanese car-buyer distribution.
B)The sample results don't "fit" the Japanese car-buyer distribution.
C)The sample size is too small to determine whether the results are consistent with the Japanese car-buyer distribution.
D)Sample results are very unreliable.

Question

Quizplus · Accepted Answer

Since the p-value (.0329) is less than the significance level (5% or 0.05), we reject the null hypothesis. This means the satisfaction levels of American car buyers are significantly different from those of Japanese car buyers.

It Is Reported That 70% of Car Buyers Who Recently