Regimen cause participants to lose weight

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Researchers are interested in determining if a new exercise regimen helps people lose weight. They recruit 22 participants and find that they have an average weight of 164.3 pounds. After implementing the exercise regimen for a month, the researchers find that the participants had an average weight of 155.9 pounds. Therefore, the mean difference between groups ( ) is -8.4 pounds. (That is the average change in weight from before the exercise regimen to after the exercise regimen.) The standard deviation of difference scores (sD) was 25.7 pounds. At a significance level of .05, did the exercise regimen cause participants to lose weight? Be sure to compute the standard error of the difference scores (s D) to use in the equation for computing t.

Reference no: EM132399732

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