A cumulative frequency polygon is also called （）.

One advantage of a stem and leaf plot over a frequency distribution is that （）.

某企業(yè)2018年技術(shù)工占50%，2019年新招收了一批學徒工，使學徒工的比重增加了10%。假定全廠各級工資水平均無變化，則2019年職工總平均工資將（）

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

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

The number of class intervals in a frequency distribution is usually between （）.

Which of the following statements is not true？（）

Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）

某企業(yè)的生產(chǎn)計劃完成百分比采用如下分組，請指出哪項是正確的（）

在組距數(shù)列中，下限就是（）