qWhen the true
correlation coefficient is zero (H0: r=0 and H1: r¹0)
q Use Student-t to test the significance of r
q
q and n = N-2 degree of freedom
q
q
qWhen the true correlation
coefficient is not expected to be
zero
q We can not use a symmetric normal distribution for the
test.
q We
must use Fisher’s Z transformation to convert the distribution of r
q
to a normal distribution:
q