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Problem 9. A researcher studied how two diets compare in terms of weight loss after 6...

Problem 9. A researcher studied how two diets compare in terms of weight loss after 6 months. 40 people used the first diet. Their sample mean was 44, and their sample standard deviation was 10. 60 people used the first diet. Their sample mean was 37, and their sample standard deviation was 15. Give the 92% confidence interval for the true difference between the mean weight losses.

Problem 10. Refer to the information in Problem 9. Can we conclude that the two diets really differ in terms of the mean weight loss?

Math   Statistics-And-Probability   
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