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最新試題
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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 （）.
什么是季節(jié)變動(dòng)？研究它的意義何在？如何測(cè)定季節(jié)變動(dòng)？
時(shí)間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組，請(qǐng)指出哪項(xiàng)是正確的（）
A cumulative frequency polygon is also called （）.
對(duì)全國(guó)各鐵路交通樞紐的貨運(yùn)量、貨物種類等進(jìn)行調(diào)查，以了解全國(guó)鐵路貨運(yùn)概況。這種調(diào)查屬于（）
Which of the following is not the goal of descriptive statistics?（）
The number of class intervals in a frequency distribution is usually between （）.