In descriptive statistics, the interquartile range (IQR), also called the midspread or middle fifty, is a measure of statistical dispersion, being equal to the difference between the upper and lower quartiles, IQR = Q3 − Q1
Read more about Interquartile Range: Use, Interquartile Range of Distributions, Interquartile Range and Outliers
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“They didn’t know
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—Hilda Doolittle (1886–1961)