A.分類變量
B.分組變量
C.匯總變量
D.目標(biāo)變量
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最新試題
If the individual class frequency is divided by the total frequency, the result is the ().
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個車間,這四個車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少?
以2000年a0為最初水平,2016年an為最末水平,計算鋼產(chǎn)量的年平均發(fā)展速度時,須開()
在組距數(shù)列中,下限就是()
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?
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()
品合格率指標(biāo)是()
什么是季節(jié)變動?研究它的意義何在?如何測定季節(jié)變動?
Which of the following is not the goal of descriptive statistics?()
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of ().