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1、0品牌得分概率得分乘概率离差平方乘积240.10130.20220.35210.25200.101合计1.0031均值1方差1230013140423302132-2.916494850-0.82865426521.3996259442-0.048863742-0.99907538221222412212231200131122032220114241330332141014102222423214133202222214221121111323041311232411112104242344244132323123312110222031221110414112200144234121224
2、030223322123210122114210322111112222321241322112231130110033023210100113312120434323312222212234220332312121421134211024121432402123223311331300211312233432320320202214403332112322130223133312334243312142300213024413202332111211213123210121322321210421223133042222422102122312143120120011222420221132
3、224102221110431112334224231101222222432322321242113203142202320332221422123200122113201224130330113423311402304002321223200022131031221434102341222130312413212224022423144211341311311241112123143222232222223432104243220232103222223220243224114322221130222221420212232301323301122120142123221211014010
4、24224241134320312121221312232420023401314212021141102202221221432211223113102223022310112133231132402143212424402021124233201212242220422313332011202341220103230423101120332213321114032342013433122121221223211x一般正态分布标准正态分布均值0-5标准差1-4.9-4.8-4.7-4.6-4.5-4.4-4.3-4.2-4.1-4-3.9-3.8-3.7-3.6-3.5-3.4-3.3-3.2-3.1-3-2.9-2.8-2.7-2.6-2.5-2.4-2.3-2.2-2.1-2-1.9-1.8-1.7-1.6-1.5-1.4-1.3-1.2-1.1-1-0.9-0.8-0.7-0.6-0.5-0.4-0.3-0.2-0.100.10.20.30.40.50.60.70.80.911.11.21.31.41.51.61.71.81.922.12.22.32.42.52.62.72.82.933.13.23.33.43.53.63.73.83.944.14.24.34.44.54.64.74.84.95x二项分布P(x)正态分布np 均值标准差
