A research study was designed to have a power of 70 percent to detect a 50 percent difference in the two study group means. How can this statement be interpreted?
A) The investigator had a 70 percent chance of detecting a difference of 50 percent or more if it was actually present.
B) The investigator had a 70 percent chance of rejecting the null hypothesis if it is actually true.
C) The investigator had a 70 percent chance of retaining the null hypothesis if it is actually false.
D) The probability of rejecting a false null hypothesis is 30 percent.
Answer
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PSM MCQs
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