48. The power curves of Figures 11.5 and 11.6 can be used to obtain b  P(type II error) for the F test in two-factor ANOVA. For xed values of a1, a2, . . . , aI, the quantity is computed.

Then the gure corresponding to v1I1 is entered on the horizontal axis at the valuef, the power is read on the vertical axis from the curve labeled v2 

(I1)(J1), and b1power.

a. For the corrosion experiment described in Exercise 36, ndbwhena14,a20,a3a42, and s  4. Repeat for a1  6, a2  0, a3  a4 

3, and s4.

b. By symmetry, what is b for the test of H0B versus HaB in Example 11.11 when b1  .3, b2  b3 

b4.1, and s  .3?