(5)设随机变量X的分布律为 X=k =theta ((1-theta ))^k-1 ,k=1, 2,···,其中 lt theta lt 1.-|||-若 Xleqslant 2 =dfrac (5)(9), 则 X=3 = __ .

2.设总体X的分布列为-|||-(X=k)=(k-1)(theta )^2((1-theta ))^k-2 =2, 3,···, lt theta lt 1,-

1.设随机变量X的分布律为-|||-X 1 2 3-|||-p θ^2 .theta (1-theta ) .((1-theta ))^2-|||-试求θ的矩估

（1）设随机变量X的分布律为 X=k =lambda ((1-lambda ))^k-1 =1, 2,...，其中 X=k =lambda ((1-lambda

1.设总体X的分布律为-|||-x 1 2 3-|||-pk θ^2 (1-theta ) ((1-{theta ))^2}-|||-其中, theta (0l

13.设总体X的概率分布律为 (x,theta )=(x-1)(theta )^2((1-theta ))^x-2 x=2 ,3,···; lt theta l

[4.4]设总体X的概率分布为-|||-X o 1 2 3-|||-p θ^2 (1-theta ) θ^2 1-20-|||-其中 theta (0lt th

2.设随机变量X的分布律为 X=k =dfrac (1)({2)^k} ,k=1,2,···, 求 =sin (dfrac (pi )(2)x) 的分布律.

3.设总体X的概率分布为-|||-X 0 1 2 3-|||-pk θ^2 (1-theta ) θ^2 1-20-|||-其中 theta (0lt thet

【题目】-|||-设总体X的概率密度为-|||-(x;theta )= ,0lt xlt theta dfrac {1)(2(1-theta )),the

_(1)^theta +(K)_(2)^theta C. _(1)^theta /({K)_(2)}^theta D. _(2)/(K)_(1)^theta