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数学
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the three properties of a normal distribution
人气:368 ℃ 时间:2020-04-20 20:15:54
解答
A 服从高斯分布G(2.2,0.25);B 服从高斯分布G(1.5,0.14).
定义
Y = 6A-7B,
则Y服从高斯分布G(2.7, 0.71568).
所以
P(Y > -2.7) = P (Y/0.71568 > -3.77) = 0.999918.
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