Question: Total sample size is SAMPLE SIZE AND POWER ANALYSIS Sample Size A medical researcher wants to evaluate the changes in A1C between a group of

Total sample size is

SAMPLE SIZE AND POWER ANALYSIS Sample Size A medical researcher wants to evaluate the changes in A1C between a group of patients who were given medication and an exercise regimen. A1C was taken pre and post for each patient to see if the A1C decreased from the start to the finish of the program. Use G*Power to determine the sample size by using the following: A researcher wants to use a Paired Samples t-test. The researcher expects to find an effect size (f) of 0.75 using an error probability (a) of 0.05. He wants the power of his study to be 0.80. The test is one-tailed. To find the sample size for a Paired Samples t-test, open G*Power and complete the following: Select Tests : Means : Two Dependent Groups (matched pairs) The recommended Total sample size is 15

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