Suppose a Researcher Is Testing a New Diet Drug

question 9

Essay

Suppose a researcher is testing a new diet drug. She would like to determine if the drug helps to significantly increase weight loss versus a placebo. She randomly assigns 40 participants to the treatment group and 35 to the placebo group. After 4 weeks on identical diets, the mean weights loss (in pounds) for each group is computed. Results of the study are as follows:
Treatment Group
Placebo Group
n = 40
n = 35 = 5.6 = 1.6
s = 2.85
s = 1.47
Perform a hypothesis test to draw a conclusion from this study. Show all your work.

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Definitions:

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