It Is Reported That 70% of Car Buyers Who Recently

Multiple Choice

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. If the null hypothesis is true, how many buyers in the sample of recent American car buyers would you "expect" to say that they are "extremely satisfied"?

A) 55
B) 70
C) 15
D) 62.5