判斷題方差齊性是單因素方差分析的前提要求。
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一個地區(qū)一定時期的商品零售額屬于()
題型:多項選擇題
The number of class intervals in a frequency distribution is usually between ().
題型:單項選擇題
對全國各鐵路交通樞紐的貨運量、貨物種類等進行調(diào)查,以了解全國鐵路貨運概況。這種調(diào)查屬于()
題型:單項選擇題
時間序列構(gòu)成因素有哪些?分解的基本原理和思路是什么?
題型:問答題
A cumulative frequency polygon is also called ().
題型:單項選擇題
品合格率指標是()
題型:單項選擇題
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
題型:單項選擇題
某廠某年職工勞動生產(chǎn)率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()
題型:單項選擇題
Descriptive statistics deals with methods of()
題型:單項選擇題
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the approximate range of the number of phone calls arriving each hour?()
題型:單項選擇題