A.7%
B.8%
C.9%
D.10%
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A.樣本空間
B.事件
C.實(shí)驗(yàn)
D.概率
A.95%
B.89%
C.68%
D.99%
A.
B.
C.
D.
某汽車交易市場共發(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（）來測度這一集中趨勢比較合適。
A.眾數(shù)
B.中位數(shù)
C.平均數(shù)
D.極差
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A summary measure that is computed from a sample to describe a characteristic of the population is called（）
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
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（）
A cumulative frequency polygon is also called （）.
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？（）
對某班級(jí)學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查，下列標(biāo)志中屬于不變標(biāo)志的是（）
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 cumulative frequency of the third class？（）
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 （）.
常用的長期趨勢測定的方法有哪些？各有什么特點(diǎn)？
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（）