Quartile deviation for Grouped Data

Posted by mbalectures | Posted in Descriptive statistics | 14,971 views | Posted on 15-06-2010

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Quartile deviation or semi-interquartile range is the dispersion which shows the degree of spread around the middle of a set of data. Since the difference between third and first quartiles is called interquartile range therefore half of interquartile range is called semi-interquartile range also known as quartile deviation. For both grouped and ungrouped data, quartile […]