In 1977, men who were under 50 years old had a mean weight of 175 pounds, with a standard deviation of 18 pounds. You are required to test whether the mean body weight in the population then and now differ.  Which statistical test would you conduct? State both the null and the alternative hypotheses.

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Q3. In 1977, men who were under 50 years old had a mean weight of 175 pounds, with a standard deviation of 18 pounds. You are required to test whether the mean body weight in the population then and now differ. 

Which statistical test would you conduct?

State both the null and the alternative hypotheses.

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