Question: I am planning to run a study to examine the relationship between the number of practice problems and the % score on the exam they

I am planning to run a study to examine the relationship between the number of practice problems and the % score on the exam they are practicing for. I expect to find a correlation of about .40.

(a)

Calculate the effect size for these results (to 2 decimals). Always report the effect size as positive.

(b)

What total sample size should I use in a replication of this study to have 80% power?

(c)

Is this an appropriate sample size to use for the planned replication?

		No, this sample size won't provide enough power.
		Yes, this sample size will provide adequate power.

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