Question

Consider the following hypothesis test: H0: u = 15 Ha: u ≠ 15

A sample of 40 provided a sample mean of 14.17. The population standard deviation is 5. 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)?

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

answer the next questions using the critical value approach.

d. Using 0.05, what are the critical values for the test statistic (+ or -)

State the rejection rule: Reject H0 if z is (greater than, less than, equal to, etc.) the lower critical value and is (greater than, less than, equal to, etc.) the upper critical value.

Can it be concluded that the population mean is not equal to 15?
- Select your answer -YesNo

Answer 1