According to the Centers for Disease Control and Prevention, average life expectancy has risen to 77.6...

According to the Centers for Disease Control and Prevention, average life expectancy has risen to 77.6 years. It has been suggested has rural areas in the Southwest have a shorter life span than the general population. In a random sample of 18 recently deceased residents of the rural Southwest, the average life span was 75.9, with a sample standard deviation of 9.8 years.

a. State the null and alternative hypotheses to be used to test whether residents in the Southwest have a shorter life span than the general population.

b. If the significance level is a = 5%, can the null hypothesis be rejected?

c. What is the p-value of the appropriate test statistic (you will need Excel’s =T.DIST(x,df,True) function)?

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Expert Solution

orchestra answered 1 year ago

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