In the past, the average age of employees of a large corporation has been 40 years.Recently, the company has been hiring older individuals.In order to determine whether there has been an increase in the average age of all the employees, a sample of 64 employees was selected.The average age in the sample was 45 years with a standard deviation of 16 years.Let α = .05.
a.
State the null and the alternative hypotheses.
b.
Compute the test statistic.
c.
Using the p-value approach, test to determine whether or not the mean age of all employees is significantly more than 40 years.

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The Answer of In the past, the average age of employees of a large corporation has been 40 years.Recently, the company has been hiring older individuals.In order to determine whether there has been an increase in the average age of all the employees, a sample of 64 employees was selected.The average age in the sample was 45 years with a standard deviation of 16 years.Let α = .05.
a.
State the null and the alternative hypotheses.
b.
Compute the test statistic.
c.
Using the p-value approach, test to determine whether or not the mean age of all employees is significantly more than 40 years.

In the Past, the Average Age of Employees of a Large