Because of the rising costs of industrial accidents, many chemical, mining, and manufacturing firms have instituted safety courses. Employees are encouraged to take these courses designed to heighten safety awareness. A company is trying to decide which one of two courses to institute. To help make a decision, eight employees take Course 1 and another eight take Course 2. Each employee takes a test that is graded out of a possible 25 points. The safety test results are shown below. Assume that the scores are normally distributed. The company wants to know if the marks from Course 1 are less than the marks from Course 2.

A) State the Null and Alternative Hypotheses.

B) Is this a left-tailed, right-tailed, or two-tailed test?

C) Run an appropraite t-test (use 5% level of significance); use cell F26 for your output.

D) Change correct p-value to a % and highlight yellow. Make a decision based on your t-test results.