问答题
简答题
为什么在计算平均指标的基础上还有必要进一步计算变异指标？
【参考答案】
在计算平均指标的基础上，进一步计算变异指标是必要的，因为变异指标能够反映一组数据的离散程度，即数据分布的波动性或分散性。......
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相关考题
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单项选择题
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.80
B.200
C.20
D.100 -
单项选择题
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.80
B.0.40
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单项选择题
A cumulative frequency distribution would provide（）.
A.a graph of a frequency distribution
B.a running total of the frequencies in the classes
C.the proportion of the total frequencies which fall into each class
D.a very cloudy picture of the frequencies
