Answers CA-Statistics and Probability B Introduction to Confidence IntervalsQuestion 4

4

AssignmentMultiple Choice

Introduction to Confidence Intervals

Question 4 • CA-Statistics and Probability B

Is it reasonable to assume that more than half of the patients from this dental office prefer fruit- flavored toothpaste to mint-flavored toothpaste?

Answer

A

We cannot determine this without surveying all of the office’s patients.

B

Yes, it is reasonable to assume this because another 95% confidence interval might contain 0.50.

C

No, it is not reasonable to assume this, because there are only two choices and the proportion of patients who should prefer either is exactly equal.

D

No, it is not reasonable to assume this, because 0.50 is above the upper boundary of the confidence interval.

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