A.提出需要解決的問(wèn)題B.確定解決問(wèn)題的目標(biāo)C.檢索解決問(wèn)題的方法D.制定解決問(wèn)題的方案E.比較備選方案并做出選擇
A.RiskDifferenceB.RandomEffectsC.MeanDifferenceD.FixedEffectE.Std .MeanDifference