Question

1. Cholesterol Levels (Dependent Samples t – traditional)

A doctor wishes to see if men’s cholesterol levels will change if they alter their exercise routine to include weight training. Six subjects were pretested and then changed their exercise routine for 6 weeks. The results are provided in the table below. Can it be concluded that the cholesterol level has been changed at α = 0.05? Assume the variable is approximately normally distributed.

Subject	1	2	3	4	5	6
Before (X1)	208	172	210	244	235	190
After (X2)	210	173	190	228	170	188

Step 1: State the hypotheses.

Step 2: Compute the df, Determine the tailed-ness, and Find the Critical Value

Step 3: Compute the test value.

Before (X1)	After (X2)	D = X1 – X2	D2
208	210
172	173
210	190
244	228
235	170
190	188

Step 4: Make the decision.

Step 5: Summarize the results.

Answer 1