Problema Solution
Determine whether a correlation coefficient of r = –0.405 is significant at the 5% level for a sample size of 22.
Answer provided by our tutors
t = 0.405*sqrt((22-2)/(1-0.405^2)) = 1.980949 < Tcrit, n-2, 0.05 = 2.085963
So no, it is not significant for the two-tailed test of H0: true p = 0 vs Ha: true p not equal 0