To detect a significant difference between two groups when the effect size is small, what should the researcher do?
a. Conduct a pilot study.
b. Obtain a different sample.
c. Increase the sample size.
d. Perform additional analysis.
ANS: C
Increasing the sample size makes it easier to detect a difference.
A pilot study will help iron out problems with the methodology, but would not change the effect size.
Obtaining a different sample would not change the effect size.
Additional analysis would not change the effect size.
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