https://manuals.pqstat.pl/ 2026-05-25T13:44:01+00:00 https://manuals.pqstat.pl/ https://manuals.pqstat.pl/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-02-10T23:15:38+00:00 Anonymous (anonymous@undisclosed.example.com) https://manuals.pqstat.pl/en:statpqpl:aopisowapl:statopispl:miarpl:martenpl Measures of central tendency Measures of central tendency are so-called average measures that characterize the average or typical level of a trait's values. Arithmetic mean is expressed by the formula: where is the consecutive values of the variable and text/html 2022-02-10T23:16:47+00:00 Anonymous (anonymous@undisclosed.example.com) https://manuals.pqstat.pl/en:statpqpl:aopisowapl:statopispl:miarpl:miarinnenpl Other measures of location Quartiles, deciles, centiles Quartiles (, , ) divide the ordered series into 4 equal parts, deciles (, ) into 10 equal parts and centiles (percentiles: , ) into 100 equal parts. The second quartile, fifth decile, and fiftieth centile are equal to the median. These measures can be used in the