8.7. How large a x 2

value provides a E-value of 0.05 for testing independence for the following table dimensions?

a) 2 x 2

b) 3 x 3

c) 2 x 5

d) 5 x 5

e) 3 X 9 8.8. Show that the contingency table in Table 8.21 has four degrees of freedom by showing how the four cell counts given determine the others.

TABLE 8.21 10 20 30 40 50 80 70