A.1065
B.1066
C.1067
D.1068
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A.Z<-1.96
B.Z>1.96
C.Z>1.65
D.Z<-1.65
A.7~13
B.8~12
C.9~11
D.9.5~10.5
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
對某班級學(xué)生的生活狀況進(jìn)行統(tǒng)計調(diào)查，下列標(biāo)志中屬于不變標(biāo)志的是（）
One advantage of a stem and leaf plot over a frequency distribution is that （）.
某班的學(xué)習(xí)按考試成績分為60分以下，60-70，70-80，80-90，90-100，這種分組（）
If the individual class frequency is divided by the total frequency, the result is the （）.
一個地區(qū)一定時期的商品零售額屬于（）
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). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a （）.
A cumulative frequency polygon is also called （）.
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 not the goal of descriptive statistics?（）
Which of the following statements is not true？（）