6.总体X的概率分布为-|||-x 0 1 2 3-|||-P θ^2 (1-0) θ^2 https:/img.zuoyebang.cc/zyb_d23f4d31ee8f47e3f196a135dbde958d.jpg-20-|||-其中 theta (0lt theta lt dfrac (1)(2)) 是未知参数,利用总体X的如下样本值-|||-3 1 3 0 3 1 2 3-|||-求θ的矩估计值和最大似然估计值.

2.设总体X的分布律为-|||-X 0 1 2 3-|||-p θ^2 (1-theta ) θ^2 https:/img.zuoyebang.cc/zyb_a

(13)(2010年,一)设总体X的分布为:-|||-X 1 2 3-|||-p https:/img.zuoyebang.cc/zyb_2a76612f050

X=2 =0.3 , X=4 =0.5 ,则下列选项正确-|||-的是 ()-|||-A 当 https:/img.zuoyebang.cc/zyb_7f1da

设函数-|||-f(x)-|||-在区间-|||-(1,2)-|||-内连续,-|||-https:/img.zuoyebang.cc/zyb_dcce33fe

设总体X的概率分布为X 0 1 2-|||-P (theta )^2 https:/img.zuoyebang.cc/zyb_9a4dc435e7d9078a6

[题目]-|||-设 =x+-|||-A 1/2-|||-B 2-|||-C e-|||-D https:/img.zuoyebang.cc/zyb_e34c8

3.设随机变量X的分布函数为-|||-F(x)=-|||-0, leqslant 0,-|||-https:/img.zuoyebang.cc/zyb_5c5f

-dfrac (2)({x)^2} .-|||-C 2x+3 ;-|||-D https:/img.zuoyebang.cc/zyb_c1dbf8c08bc60

sqrt [4](2) C. dfrac (1)(2) D. https:/img.zuoyebang.cc/zyb_8aa7776a94adbf79d8d68

4-|||-https:/img.zuoyebang.cc/zyb_218762fe585dbabaa8e3f46957a71dcd.jpg 0 .-1 2-|