Consider the following hypothesis test:

Ho: u= 15

Ha: u is not equal to 15

A sample of 40 provided a sample mean of 14.16. The population standard deviation is 4. Enter negative value as negative number.

a.Compute the value of the test statistic (to 2 decimals).

b.What is the p-value (to 4 decimals)? Use the value of the test statistic rounded to 2 decimal places in your calculations.

c.Using a=0.05, can it be concluded that the population mean is not equal to 15?

d. What is the rejection rule using the critical value?

Reject Ho if z is ________________ the lower critical value and is _______________ the upper critical value.

Using a=0.05, what are the critical values for the test statistic? (+ or -) (to 2 decimals)

Can it be concluded that the population mean is not equal to 15?