A.45% B.90% C.95% D.47.5% E.99%
A.標(biāo)準(zhǔn)差 B.標(biāo)準(zhǔn)誤 C.變異系數(shù) D.極差 E.中位數(shù)
A.算術(shù)均數(shù) B.幾何均數(shù) C.中位數(shù) D.眾數(shù) E.調(diào)和均數(shù)