A marketing research company is estimating which of two soft drinks college stud

Question

A marketing research company is estimating which of two soft drinks college students prefer. A random sample of 148 college students produced the following confidence interval for the proportion of college students who prefer drink A, (0.344, 0.494). Is this a large enough sample for this analysis to work? A. Yes, since both n cap p greaterthanorequalto 15 and n cap greaterthanorequalto 15. B. Yes, since n = 148 (which is 30 or more). C. No. D. It is impossible to say with the given information.

Explanation / Answer

here sample estimated proportion =(0.344+0.494)/2= 0.419

hence as np[ and nq are > 15

option A is correct

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