As we have noted in previous chapters, even a very small effect can be significant if the sample is large enough. Suppose, for example, that a researcher obtains a correlation of r = 0.60 for a sample of n = 10 participants.
a. Is this sample sufficient to conclude that a significant correlation exists in the population? Use a two-tailed test with a = .05.
b. If the sample had n = 25 participants, is the correlation significant? Again, use a two-tailed test with a = .05.