Question

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 = 46353 LOWER LIMIT = 331114 Is the sample large enough for the interval to be valid? Yes, since np and ng are both greater than 15. Yes, sincen > 30. No, the sample size should be at 10% of the population. No, the population of college students is not normally distributed.

Answer 1

The solution to this problem is given by

Solution Given data is Samble Proportions - P = 0.396226 Samble Size 159 Ubber limit 0.46353 Lower Limet 0. 331114 Since the conditions required to aliskeribution for the estimated proportion is Seletisfied normal becaun nå= 159 X 0.396226 62.9999 > 15 159 x (1 -0.396226) ng = = 96 > 15 Sol the Cetreat answer is since are both greates np and na Yes than 15.