A dietitian wishes to see if a person's cholesterol level will change if the diet is supplemented by a certain mineral. Six subjects were pretested, and then they took the mineral supplement for a 6-week period. The results are shown in the table. (Cholesterol level is measured in milligrams per deciliter.) Can it be concluded that the cholesterol level has been changed at a = 0.10? Assume the variable is approximately normally distributed. Subject Before (X) After (X) 2 3 4 5 6 210 235 208 190 172 244 190 170 210 188 173 228 Step 1: State the hypotheses and identify the claim. Step 2: Compute the test value. Step 3: Find the critical value. Step 4: Make the decision. Step 5: Summarize the results.