Question: Solve and Answer the given problem using the Steps on Hypothesis Testing. Show the complete solutions. In a recent survey, a researcher claimed that the

Solve and Answer the given problem using the Steps on Hypothesis Testing. Show the complete solutions.

In a recent survey, a researcher claimed that the average life expectancy of people in a certain country is 72 years. Is his

claim correct if a random sample of 34 deaths from a country showed a mean of 71.2 years with standard deviation of 1.2 years?

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