# Critical vales

• Jan 13th 2011, 11:07 AM
ct110053
Critical vales
I am completing my maths coursework and I have a sample size of 138 pairs of data. I have calculated the spearman's rank for my data and need to do an hypothesis test to go with it. I have searched everywhere for a table of critical values for my spearman's that goes past n=100, has anyone ever found one or can tell me how you would work out what the critical value would be at a 5% significance level?

thanks :)
• Jan 13th 2011, 11:27 AM
dwsmith
For $n>30$, use

$\displaystyle r_s=\frac{\pm z}{\sqrt{n-1}}$

z is the z-score for the corresponding alpha.