We encountered this data set on adolescent obesity earlier in Project A. Fifty a

Question

We encountered this data set on adolescent obesity earlier in Project A. Fifty adolescents between 14 and 18 years old with a body mass index (BMI) higher than 35 were recruited in Australia for this study. Half of the group was randomly selected to receive the gastric banding treatment and the remaining twenty-five were assigned to a supervised lifestyle program involving diet, exercise, and behavior modification. The data in Excel lists the weight losses in kilograms for the participants who completed the study. At what significance level do the data provide evidence that the average weight loss in the gastric banding group was GREATER than the average weight loss in the lifestyle group?

Explanation / Answer

from above at 0.4396 level of significance data provide evidence....

X 2353 1388 1166 1598 523 343 208 -169 147 -19 -394 -438 -262 -796 -349 -591 -702 -1111 -1605 -2030 mean(X) -37.000 std deviation(S) 1070.622 std error =S/(n)1/2 239.3982 t=(X-0)/std error -0.1546 p value 0.4394

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