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发表于 2013-10-8 14:51:12
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请教如何计算:
31.Acomponenthasstrengthwithmeanvalueof9,000Nand
standarddeviationof900N.Ithastowithstandaloadwith
meanvalueof5,500Nandstandarddeviationof800N.
Bothstrengthandloadarenormallydistributed.Whatis
theprobabilityoffailureforthecomponent?
(A)2.0􀀂10􀀁5
(B)1.8􀀂10􀀁3
(C)5.8􀀂10􀀁3
(D)2.0􀀂10􀀁2 |
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