73.

a. Show that b(x; n, 1  p)  b(n  x; n, p).

b. Show that B(x; n, 1  p)  1  B(n  x  1;

n, p). [Hint: At most x S s is equivalent to at least

(n  x) F s.]

c. What do parts

(a) and

(b) imply about the necessity of including values of p greater than .5 in Appendix Table A.1?