A climate researcher knows that it has previously been the case that the mean te

Question

A climate researcher knows that it has previously been the case that the mean temperature in his city has been 75.3 °F. He suspects that this may no longer be the case and that the mean temperature may now have changed, and he suspects that is has risen in recent times. He collects sample data with the aim of conducting a hypothesis test to examine his suspicions. He will use a level of significance of 0.01 for the test.

Select the correct null and alternate hypotheses for this test:

H0: 75.3 °F Ha: = 75.3 °F H0: = 75.3 °F Ha: 75.3 °F H0: = 75.3 °F Ha: > 75.3 °F H0: > 75.3 °F Ha: = 75.3 °F

Explanation / Answer

Solution:

Correct Option(C)

Explanation:

Null hypotthesis(H0):the mean temperature in his city has been 75.3 °F

Ho:=75.3

Alternate Hypothesis(Ha):

that the mean temperature may now have changed, and he suspects that is has risen in recent times.

since it is risen we use right tail test

Ha:>75.3

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