最新試題
品合格率指標是（）
One rule that must always be followed in constructing frequency distributions is that （）.
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（）
Which of the following is not the goal of descriptive statistics?（）
某班的學習按考試成績分為60分以下，60-70，70-80，80-90，90-100，這種分組（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
Descriptive statistics deals with methods of（）
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？（）
要了解某地區(qū)全部大學生的就業(yè)情況，那么（）
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 （）.