Human Resources at Ameriprise Financial conducted a study to determine how many hours a day, on average, Ameriprise employees in the Clearing department spend actually completing work. The study produced the following data set from monitoring a small sample of employees.

Data set: 6.2, 7.3, 5.4, 8.1, 9, 7.1, 6.8, 6.7, 8.2

If a=0.01, is there evidence to suggest that Clearing department employees spend an average of 7.5 hours working on an average day?

Step 1: State the hypotheses and identify the claim.

Step 2: Find the degree of freedom and critical value(s) from Table F using given ?. Draw picture.

Step 3: Compute the test value with t formula.

Step 4: Plot the test value on your picture and make a decision to reject or not reject the null hypothesis.

Step 5: Summarize the results with a complete sentence