Find the Critical Value $\mathrm { r } _ { \mathrm { S } }$

Essay

Find the critical value. Assume that the test is two-tailed and that n denotes the number of pairs of data.
-Given that the rank correlation coefficient, r $\mathrm { r } _ { \mathrm { S } }$ for 15 pairs of data is -0.359, test the claim of correlation between
the two variables. Use a significance level of 0.01.