设随机变量x~n(0.8,0.04),求下列概率,(1)P(X>0.5) (2)P(-0.2

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设随机变量x~n(0.8,0.04),求下列概率,(1)P(X>0.5)(2)P(-0.2设随机变量x~n(0.8,0.04),求下列概率,(1)P(X>0.5)(2)P(-0.2设随机变量x~n(0

设随机变量x~n(0.8,0.04),求下列概率,(1)P(X>0.5) (2)P(-0.2
设随机变量x~n(0.8,0.04),求下列概率,
(1)P(X>0.5) (2)P(-0.2

设随机变量x~n(0.8,0.04),求下列概率,(1)P(X>0.5) (2)P(-0.2
(1)
P(X>0.5)
=P((X-0.8)/0.2>(0.5-0.8)/0.2)
=P((X-0.8)/0.2>(-1.5))
=P((X-0.8)/0.2