http://manuals.pqstat.pl/ 2026-04-10T20:12:43+00:00 http://manuals.pqstat.pl/ http://manuals.pqstat.pl/lib/tpl/dokuwiki/images/favicon.ico text/html 2022-09-13T21:49:32+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:porown1grpl:parpl:t_testpl The t-test for a single sample The single-sample test is used to verify the hypothesis, that an analysed sample with the mean () comes from a population, where mean () is a given value. Basic assumptions: * measurement on an interval scale, * normality of distribution of an analysed feature. text/html 2022-02-11T18:08:23+00:00 Anonymous (anonymous@undisclosed.example.com) http://manuals.pqstat.pl/en:statpqpl:porown1grpl:parpl:war1grpl The Single-Sample Chi-square Test for a Population Variance Basic assumptions: * measurement on an interval scale, * normality of distribution of an analysed feature. Hypotheses: where: -- standard deviation of a characteristic in the population represented by the sample,