9. Give the critical 2 values for testing the null hypothesis of independence at a :05 and a :01 for each of the

9. Give the critical 2 values for testing the null hypothesis of independence at a ¼ :05 and a ¼ :01 for each of the following contingency tables:

(a) 2  3 table

(b) 2  6 table

(c) 3  5 table

(d) 2  2 table