5. In a study of the effect of a diet pill, the weight loss (in lbs) was recorded for people who took the pill and people who took a placebo. 70 people who took the pill had an average weight loss of 2.1 lbs with a standard deviation of 4.7 lbs. 50 people who took the placebo had a mean weight loss of 1.8 lbs with standard deviation of 3.5 lbs. At a=0.01, can we claim that the pill results in a greater mean weight loss than a placebo? Test with a hypothesis test. also Construct an appropriate confidence interval for

Answer Key

5.)H₀:____________H₁:_____________t=______________P-value=_______________________

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