A.要寬
B.要窄
C.相同
D.可能寬也可能窄
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A.正態(tài)分布
B.只有當(dāng)n<30時(shí),為正態(tài)分布
C.只有當(dāng)n≥30時(shí),為正態(tài)分布
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A.足夠大時(shí)
B.足夠小時(shí)
C.無論大與小
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A.隨機(jī)誤差
B.抽樣框誤差
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D.無回答誤差
五位部門經(jīng)理的年收入如表:要描述五位部門經(jīng)理的年收入的一般水平,()來測度這一集中趨勢比較合適。
A.眾數(shù)
B.中位數(shù)
C.平均數(shù)
D.極差
A.大于
B.小于
C.等于
D.不能確定大于或小于
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If the individual class frequency is divided by the total frequency, the result is the ().