最新試題
The number of class intervals in a frequency distribution is usually between （）.
If data are grouped into intervals and the number of items in each group is listed, this could be called a （）
如果居民按報(bào)告期價(jià)格購買商品需多支出40萬元，報(bào)告期商品銷售額為200萬元，則價(jià)格指數(shù)為（）
Descriptive statistics deals with methods of（）
某廠某年職工勞動(dòng)生產(chǎn)率為20000元，是歷史最高水平的1.2倍。這里的1.2倍是（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
Which of the following statements is not true？（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
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 （）.