A.2.14
B.5.66
C.7.28
D.15
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A.7%
B.8%
C.9%
D.10%
A.樣本空間
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A.95%
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A.
B.
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某汽車交易市場共發(fā)生了150項交易，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抽取一項，該項是分期付款的概率是（）
A.0.95
B.0.5
C.0.8
D.0.25
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在組距數列中，下限就是（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
一個地區(qū)一定時期的商品零售額屬于（）
如果居民按報告期價格購買商品需多支出40萬元，報告期商品銷售額為200萬元，則價格指數為（）
A cumulative frequency distribution would provide（）.
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Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). The average number of absences per employee, calculated from the personnel data of all employees, is a （）.
時間序列構成因素有哪些？分解的基本原理和思路是什么？
Which of the following statements is not true？（）
最能反映離散程度的指標是（）