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(E) The probability decreases as the power decreases

(D) The probability is impossible to determine without knowing the true mean

(C) The probability decreases as the increases

(B) The probability is determined by the type-II error of the study

(A) The probability decreases as decreases

A researcher wishes to compare the efficacy of a COX-2 inhibitor to that of ibuprofen for treatment of pain in patients with osteoarthritis. Using a visual analogue scale of 1-100, a difference of 15 points between the mean values of the treatment arms is considered to be clinically significant. Given that a true clinically relevant difference exists between the two therapies, which of the following is most true about the probability that the statistical test used in the study will fail to detect the difference?

Question 14 of 40

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