What Type of Car Is More Popular Among College Students $n \hat{p}$

question 16

Short Answer

What type of car is more popular among college students, American or foreign? One hundred fifty-nine college students were randomly sampled and each was asked which type of car he or she prefers. A computer package was used to generate the printout below for the proportion of college students who prefer American automobiles. SAMPLE PROPORTION = .396226 SAMPLE SIZE = 159 UPPER LIMIT = .46418 LOWER LIMIT = .331125 Is the sample large enough for the interval to be valid? A) Yes, since $n \hat{p}$ and $n \hat{q}$ are both greater than 15 .
B) Yes, since $n > 30$ .
C) No, the sample size should be at $10 \%$ of the population.
D) No, the population of college students is not normally distributed.

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