Question: When calculating the required sample size for a twogroup superiority RCT with a continuous outcome which of ONE of the following pieces of information is

When calculating the required sample size for a two‐group superiority RCT with a continuous outcome which of ONE of the following pieces of information is NOT required?

A. The probability of a Type I error.

B. The probability of a Type II error.

C. The variability or standard deviation of the outcome.

D. The proportion in the control group with a positive outcome.

E. The anticipated or target effect size.

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