A study is conducted to compare mean cholesterol levels for individuals following a low carbohydrate diet for at least 6 months to individuals following a conventional (low fat low calorie) diet for at least 6 months. Test if there is a significant difference in the mean cholesterol levels between the diet programs using a 5% level of significance. Info: Standard treatmenr: 124, 111, 133, 125, 128, 115 | Placebo: 134, 143,148, 142, 150, 160 | New Treatment: 114, 117, 121, 124, 122, 128