出版社：Dep. of Statistical Sciences "Paolo Fortunati", Università di Bologna
摘要：This paper deals with variability indices obtained by comparing mean values of different nature. Typically, such an index is proposed, based on the ratio between standard deviation and quadratic mean. The main properties of this index are developed, and the values that it assumes in particular distribution models are determined. Moreover, a graphic representation of the comparison between different variability Situations is added. Finally, the general structure of ratios between mean values is defined and studied.
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