设X-N (1.5 , 4) 计算 P {x<=3.5} , P {X>2.5}

2025-06-21 05:33:02
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回答1:

k(2 x2_ 2/3 x3 ) k=3/8 (2) P{12.5}= =0.3085 P {X>2.5}=1-P {x<=2.5}=1-P {x<=0.5}=1-0.6915=0.3085