If the Pearson correlation is calculated for a sample of n

If the Pearson correlation is calculated for a sample of n = 20 individuals, what value for df should be used to determine whether or not the correlation is significant?

Solution

The peason correlation coefficient is calculated for a sample of n = 25 individuals. The value of df should be used is df = n-2 = 25-2 = 23. The df = 23 should be used to determine whether or not the correlation is significant.