A.單樣本t檢驗(yàn) B.成組設(shè)計(jì)t檢驗(yàn) C.成組設(shè)計(jì)Z檢驗(yàn) D.配對(duì)設(shè)計(jì)t檢驗(yàn) E.配對(duì)設(shè)計(jì)秩和檢驗(yàn)
A.兩樣本均數(shù)相等 B.兩總體均數(shù)相等 C.兩總體均數(shù)不相等 D.兩樣本均數(shù)差別無統(tǒng)計(jì)學(xué)意義 E.兩總體均數(shù)差別無統(tǒng)計(jì)學(xué)意義
A.n1+n2, B.n11n2,-1 C.n1+n2,+1 D.n1+n2,-2 E.n1+n2,+2