A.7~13
B.8~12
C.9~11
D.9.5~10.5
您可能感興趣的試卷
你可能感興趣的試題
A.右側(cè)檢驗
B.左側(cè)檢驗
C.雙側(cè)檢驗
D.上側(cè)檢驗
A.概率
B.事件
C.實驗
D.樣本空間
最新試題
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？（）
什么是季節(jié)變動？研究它的意義何在？如何測定季節(jié)變動？
以2000年a0為最初水平，2016年an為最末水平，計算鋼產(chǎn)量的年平均發(fā)展速度時，須開（）
在組距數(shù)列中，下限就是（）
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？（）
為什么在計算平均指標的基礎上還有必要進一步計算變異指標？
A cumulative frequency polygon is also called （）.
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（）
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 cumulative frequency of the third class？（）