A Researcher Is Preparing a Grant That Will Focus on Comparing

Multiple Choice

A researcher is preparing a grant that will focus on comparing mother's history of drug abuse (history vs. no history) and infant birth weight. The grant proposal requires a sample size calculation for testing the difference between the two groups. In order to calculate the sample size, the researcher needs the following three items:

A) Power, type 1 error rate, and effect size.
B) Confidence interval and power.
C) p-value, power, and effect size.
D) Sample size is not needed.