题目内容

设X ~B(n, p),且E(X )= 9,D(X )= 3.6,则分布参数n=,p=.

查看答案
更多问题

下列各分布中,期望值等于8,方差等于4的是()(A)N (8, 16); (B) B (16, 0.5);(C)π(8);(D)U(6, 10)

The Jurassic Park is _____ Steven Spielberg movie in which _____ hero fights bravely and protects his friends and family from dinosaurs.

A. /;the
B. a;the
C. /;a
D. the;a

Mr. Brown, ______ chairman of the trade union, will visit our factory in _____ month of May.

A. /; the
B. a; the
C. the; /
D. the; the

_______ meeting held last night was _________ great success.

A; a
B. A ; /
C. The ; a
D. The ; /

答案查题题库