2. A dietitian wishes to see if a person's cholesterol level will change if the diet is supplemented by a certain mineral. Six respondents were pretested and then took the mineral supplement for a six-week period. Can it be concluded that the cholesterol level has been changed at = 0.10. Assume that the data is approximately normally distributed. Cholesterol level is measured in milligrams per deciliter. Subject 1 2 3 4 6 Before 210 235 208 190 172 244 After 190 170 210 188 173 228

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