As we have noted in previous chapters, even a very small effect can be significant if the sample is large enough For each of the following, determine how large a sample is necessary for the correlation to be significant Assume a two tailed test with 05 (Note The table does not list all the possible df values Use the sample size corresponding to the appropriate df value that is listed in the table ) a A correlation of r 0 30 b A correlation of r 0 25 c A correlation of r 0 20

Question: As we have noted in previous chapters, even a very small effect can be significant if the sample is large enough. For each of the

As we have noted in previous chapters, even a very small effect can be significant if the sample is large enough. For each of the following, determine how large a sample is necessary for the correlation to be significant. Assume a two-tailed test with α = .05. (Note: The table does not list all the possible df values. Use the sample size corresponding to the appropriate df value that is listed in the table.)
a. A correlation of r = 0.30.
b. A correlation of r = 0.25.
c. A correlation of r = 0.20.

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