Is it the Pearson's or Spearman's version needed as they have different ways to find the degrees of freedom. Are students expected to calculate the degrees of freedom for the coefficient correlation as in the Collins textbook it is not explained at all. Thanks
if spearmans rank of correlaiton coefficient measures associaiton rather than correlaiton between two variables, why write null hypotheis with correlation, shoudlnt it be association, that's what we do in maths a level!