在組距數(shù)列中，下限就是（）

A cumulative frequency distribution would provide（）.

某企業(yè)2018年技術工占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（）

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

如果居民按報告期價格購買商品需多支出40萬元，報告期商品銷售額為200萬元，則價格指數(shù)為（）

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？（）

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

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（）

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

A summary measure that is computed from a sample to describe a characteristic of the population is called（）