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, 55 said they were "extremely satisfied" with their purchase, 20 said they were "somewhat satisfied," 15 said they were "somewhat unsatisfied," and 10 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. Report the value of the chi-square test statistic..
A)12.38
B)8.25
C)21.7
D)6.39

Question

Quizplus · Accepted Answer

The chi-square test statistic is calculated by comparing the observed frequencies of satisfaction levels for American car buyers with the expected frequencies based on the satisfaction levels of Japanese car buyers. The calculation results in a chi-square value of 12.38.

It Is Reported That 70% of Car Buyers Who Recently