We are trying to test whether a new low fat diet actually helps obese people lose weight. 150 randomly obese people are assigned to group 1 and put on a low-fat diet. Another 150 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 6 months, the mean weight loss was 24pounds for group 1 with a standard deviation of 7 pounds, and for group 2 the mean weight loss was 20 pounds with a standard deviation of 5 pounds. Is the low fat diet more effective? Perform a hypothesis test at the 1% significance level. a) Define the parameters b)Test statistics c)P-value approach
We are trying to test whether a new low fat diet actually helps obese people lose weight. 150 randomly obese people are assigned to group 1 and put on a low-fat diet. Another 150 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 6 months, the mean weight loss was 24pounds for group 1 with a standard deviation of 7 pounds, and for group 2 the mean weight loss was 20 pounds with a standard deviation of 5 pounds. Is the low fat diet more effective? Perform a hypothesis test at the 1% significance level.
a) Define the parameters
b)Test statistics
c)P-value approach
d) Conclusion
e) Construct an appropriate confidence interval and state the conclusion
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