Guidelines for the Jolly Blue Giant Health Insurance Company Say

Multiple Choice

Guidelines for the Jolly Blue Giant Health Insurance Company say that the average hospitalization for a triple hernia operation should not exceed 30 hours. A diligent auditor studied records of 16 randomly chosen triple hernia operations at Hackmore Hospital, and found a mean hospital stay of 40 hours with a standard deviation of 20 hours. "Aha!" she cried, "the average stay exceeds the guideline." The p-value for a right-tailed test of her hypothesis is:

A) between .05 and .10.
B) between .025 and .05.
C) between .01 and .025.
D) less than .01.