±1σ = 0.6826
±1.96σ = 0.95
±2σ = 0.9544
±2.575σ =0.99
±3σ =0.9974
★★★★★
±1...
16.一般而言,母群體的平均數落入「樣本平均數±1.96σ」的機會有多少? (..-阿摩線上測驗