Answer Happy

A clinical trial is testing whether a new drug can improve weight loss over just diet and exercise alone. All participants are on the same diet and exercise regimen, but Group Ais given a placebo and Group B is given the new drug with its active ingredient. At the end of the trial, the researchers want to test HOAMB = 0 vs. HAHA - MB < 0, where my and up represent the mean weight loss for the placebo and drug groups, respectively. Which of the following is the definition of the Type I error in this scenario? Concluding that the placebo and the drug have the same effect on average weight loss when there actually is a difference Concluding that the average weight loss is greater on the drug than on the placebo, but it actually is not Concluding that the drug has the same effect on average weight loss as the placebo, when it actually leads to greater weight loss Concluding that the placebo has a greater impact on weight loss compared to the drug, when in fact the drug has a greater impact Concluding that the average weight loss on the placebo is higher than the drug when in fact there is no difference