A meteorologist claims that the average of the highest temperatures in the United States is 98º. A random sample of 50 cities is selected, and the highest temperatures are recorded. The data are shown. At α = 0.05, can the claim be rejected? Assume σ = 7.71.
Perform each of the following steps.
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.
Use the traditional method of hypothesis testing unless otherwise specified.

  • CreatedSeptember 02, 2015
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