12-28. Recalculate = P(TIIE) for the preceding problem when: (a) n increases to 100 (b) ...

12-28. Recalculate β = P(TIIE) for the preceding problem when:

(a) n increases to 100

(b) α decreases to 0.01

(c) σ increases to 15

(d) μ1 decreases to 15