Specify the rejection region for Spearman’s nonparametric test for rank correlation in each of the following situations:
a. H0: ρ = 0, Ha: ρ ≠ 0, n = 10, α =.05.
b. H0: ρ = 0, Ha: ρ > 0, n = 20, α =.025
c. H0: ρ = 0, Ha: ρ < 0, n = 30, α =.01
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