From Chapter 4 and 5 to discuss global trends into the temple, and Slovakia to view distribution characteristics of intermediate values is distributed that information much educational information, but it is only just. Only one group, if there are two or more data to compare the distribution of information by measuring the trend into the global distribution and measurement of each group, it is not possible to tell which group information. There is more to distribute. The relative distribution of measurement so as to compare the distribution of data from 2 or more groups, the coefficient will be used by spreading or variation coefficient (coefficient of variation: C.V.) is a measure which groups more than a distribution coefficient indicates that the Group has more than of distribution, similarly, if the Group has less dispersion coefficient indicates that the Group has distributed less than data as well.
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