英和和英

If a series of observations is arranged in ascending order, values which have below them a certain proportion of the observations are referred to as quantiles ¹ or order statistics ¹ . The median (140-6) has been previously mentioned. Other important order statistics are the quartiles ², the deciles ³, and the percentiles ⁴ or centiles ⁴, which divide the observations into four, ten and a hundred equal parts respectively. More...