Bio Stats

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 diet (Low-fat, low calorie) for at least 6 months. The data are summarized below:

Diet Program sample size Mean cholesterol Std Dev Cholesterol

Low carbohydrate 50 225.4 24.5

Conventional 75 203.8 21.6

Test if there is a significant difference in mean cholesterol levels between the diet programs using a 5% level of significance.