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??????>>???????>>???????>>?????????????????? ????????(2)

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????????? ???????2014-11-18 10:52 40407??????:

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Step1??????????2?????????????????????????2??????????????????????????????????????????????????????????81??83????????????????????????????????????2???????????????????……

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Step2?????????????????????????????(С??λ)

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1?????????????;

???????????????50??????1????????50?????????1?Σ??????????0.2%??

?????????????0.2%*49=9.8%

2?????????????;

???????????????Max?+9????0???9????????1??????1%??

????????????1%*9=9%

???????????????????

??????????????????????ó????????????????????????

61.2%+0.2%*49+1%*9=80%

???????????????????????????

????????2?????????????????????????????????

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