Human oral normal body temperature is believed to be 98.6 F, but there is evidence that it

Question:

Human oral normal body temperature is believed to be 98.6° F, but there is evidence that it actually should be 98.2° F [Mackowiak, Wasserman, Steven and Levine, JAMA (1992, Vol. 268(12), pp. 1578–1580)]. From a sample of 52 healthy adults, the mean oral temperature was 98.285 with a standard deviation of 0.625 degrees.

(a) What are the null and alternative hypotheses?

(b) Test the null hypothesis at α = 0.05.

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