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？

A cumulative frequency distribution would provide（）.

If the individual class frequency is divided by the total frequency, the result is the （）.

最能反映離散程度的指標(biāo)是（）

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 （）.

One rule that must always be followed in constructing frequency distributions is that （）.

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（）

A cumulative frequency polygon is also called （）.

Descriptive statistics deals with methods of（）

企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過(guò)四個(gè)車間，這四個(gè)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？