A.histogram
B.ogive
C.stem and leaf chart
D.pie chart
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A.the number of classes must be less than 10
B.each data point can only fall into one class
C.the width of each class is equal to the range
D.the number of intervals must be an odd number
A.it contains more class intervals
B.the values of the original data are retained
C.the class midpoints are used as the stem
D.the class midpoints are used as the leaf
A.3 and 5
B.7 and 9
C.5 and 15
D.1 and 25
A.an ogive
B.a histogram
C.a frequency polygon
D.a stem and leaf plot
A.midpoint frequency
B.cumulative frequency
C.stem and leaf plot
D.relative frequency
最新試題
A cumulative frequency polygon is also called （）.
The number of class intervals in a frequency distribution is usually between （）.
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？（）
為什么在計算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計算變異指標(biāo)？
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 （）.
最能反映離散程度的指標(biāo)是（）
時間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？
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 （）.
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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？（）