MockInterview Staff asked 6 years ago We are trying to test whether a new low fat diet actually helps obese people lose weight.
100 randomly assigned obese people are assigned to group 1 and put on the low fat diet. Another 100 randomly assigned obese people are assigned to group 2 and put on a diet of approximately the same amount of food, but not as low in fat.
After 4 months, the mean weight loss was 9.31 lbs for group 1 (s = 4.67) and 7.40 lbs (s = 4.04) for group 2.
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MockInterview Staff answered 6 years ago Answer on Khan Academy: https://www.khanacademy.org/math/statistics-probability/significance-tests-confidence-intervals-two-samples/comparing-two-means/v/confidence-interval-of-difference-of-means
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