A.樣本空間
B.事件
C.實(shí)驗(yàn)
D.概率
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A.95%
B.89%
C.68%
D.99%
A.
B.
C.
D.
某汽車交易市場(chǎng)共發(fā)生了150項(xiàng)交易，將銷售記錄按付款方式及汽車類型加以區(qū)分如下：
如果從銷售記錄中隨機(jī)抽取一項(xiàng)，該項(xiàng)是分期付款的概率是（）
A.0.95
B.0.5
C.0.8
D.0.25
五位部門經(jīng)理的年收入如表：
要描述五位部門經(jīng)理的年收入的一般水平, 用（）來測(cè)度這一集中趨勢(shì)比較合適。
A.眾數(shù)
B.中位數(shù)
C.平均數(shù)
D.極差
最新試題
時(shí)間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組，請(qǐng)指出哪項(xiàng)是正確的（）
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）
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 （）.
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
品合格率指標(biāo)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？（）
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
以2000年a0為最初水平，2016年an為最末水平，計(jì)算鋼產(chǎn)量的年平均發(fā)展速度時(shí)，須開（）
A cumulative frequency polygon is also called （）.