Statistical Power of a trial is equal to:: (A) 1 + a, (B) 1 - b, (C) a + b, (D) a / b
Answer is B. Statistical power of a test Power of a statistical test = 1 - probability of type II error = 1 -b Is probability of rejecting a Null hypothesis when a predetermined clinically significant difference is a indeed present Power can be increased by increasing the no. of subjects in a trial