14.55 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   0.05.

b. Ho: No correlation Ha: Positively correlated with n  27 and   0.05.

c. Ho: Variable A has no effect on variable B.

Ha: Variable B decreases as variable A increases.

with n  18 and   0.01.