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박동준 ( Dong Joon Park ),황현미 ( Hyun Mi Hwang ) 한국품질경영학회 1998 품질경영학회지 Vol.26 No.3
It is necessary to describe a data set after collection of data in elementary statistics course. Two major numerical summary of the data set may be measures of central location and dispersion. There are various numerical summary methods in presenting how data are dispersed and each method has its own advantages and disadvantages. Quartiles are discussed among several methods to describe dispersion of data set. When data type is discrete, exact quartile values are sometimes ambiguous to find, whereas exact quartile values are obtained for continuous data. Examples of both data types are given. Programs listed below may be used to provide quartiles in MINITAB and SAS.