The formula for a confidence interval for Pearson's r is given elsewhere.

with N - 2 degrees of freedom, r is Pearson's correlation and N is the number of pairs of scores that went into the computation of r. For example, consider the data shown below: .

X Y 2 5 3 7 4 7 5 9 6 12 9 11With r = .8614 and N = 6,

with 6 - 2 = 4 degrees of freedom. From a t table, it can be found that the two-tailed probability value is p = 0.0275.