02-09-2010, 09:17 AM
You are conducting a research study and wish to know whether two different drugs are equally effective.
H0 [null hypothesis]: Drugs A and B are equally effective.
Ha [alternative hypothesis]: Drug B is more effective than A.
Your study uses an alpha-level of alpha=0.05. The power of the test was 0.80.
If the alternate hypothesis is actually true, what is the probability that the study will show a significant difference in efficacy between the two drugs?
A. 0.05
B. 0.20
C. 0.80
D. 0.95
E. It is impossible to determine from the information given
H0 [null hypothesis]: Drugs A and B are equally effective.
Ha [alternative hypothesis]: Drug B is more effective than A.
Your study uses an alpha-level of alpha=0.05. The power of the test was 0.80.
If the alternate hypothesis is actually true, what is the probability that the study will show a significant difference in efficacy between the two drugs?
A. 0.05
B. 0.20
C. 0.80
D. 0.95
E. It is impossible to determine from the information given