Power analysis estimates the probability of detecting a true effect given certain parameters. Which statement is true?

Power analysis estimates the probability of detecting a true effect given certain parameters. Which statement is true?

• A. It determines the expected effect size with certainty.
• B. It estimates the probability of detecting a true effect given the expected effect size, sample size, and alpha level.
• C. It replaces the need for ethical approval.
• D. It determines the study's funding amount.

Answer: (B)