Determine the test criteria that would be used to test the null hypothesis for the following Spearman rank correlation experiments:
a. Ho: No relationship between the two variables; Ha:There is a relationship; with n = 14 and a = 0.05.
b. Ho: No correlation; Ha: Positively correlated; with n = 27 and a = 0.05 .
c. Ho:Variable A has no effect on variable B; Ha:Variable B decreases as variable A increases; with n = 18 and a = 0.01 .