您可能感興趣的試卷
你可能感興趣的試題
最新試題
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（）
某班的學(xué)習(xí)按考試成績分為60分以下，60-70，70-80，80-90，90-100，這種分組（）
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 cumulative frequency of the third class？（）
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？（）
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？
Descriptive statistics deals with methods of（）
一個地區(qū)一定時期的商品零售額屬于（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
A cumulative frequency polygon is also called （）.
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（）