Statistical Power and Hypothesis Testing
In a double-blind experiment comparing a new pain medication to a standard treatment, the results were not statistically significant (p = 0.37). The study was designed with 80% power to detect a clinically meaningful difference. Which of the following is the most appropriate conclusion?
A
A larger sample size is needed to detect the difference.
B
The experiment failed to prove anything.
C
The new medication is ineffective.
D
There is evidence the new medication is equivalent to standard treatment.
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