Question: As we have noted in previous chapter 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 correlation to be significant. Assume a two tailed test at Alpha 0.05. (Note b/c the table does not list every possible DF value; you cannot determine every possible sample size. In each case use he sample size corresponding to the appropriate df value in this table.

1. A correlation of r=0.40
2. A correlation of r=0.30
3. A correlation of r=0.20

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