Metodologia de la investigació: diferència entre les revisions

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==Estadística descriptiva==
==Estadística descriptiva==
*[http://www.bmj.com/content/309/6960/996.full?ijkey=25f0d4f4dd03d1be9756d49c595dcc32592da57d&keytype2=tf_ipsecsha Statistics Notes: Quartiles, quintiles, centiles, and other quantiles]
*[http://www.bmj.com/content/331/7521/903.full Standard deviations and standard errors]
*[http://www.bmj.com/content/331/7521/903.full Standard deviations and standard errors]
*[http://bja.oxfordjournals.org/content/90/4/514.full Misuse of standard error of the mean (SEM) when reporting variability of a sample]
*[http://bja.oxfordjournals.org/content/90/4/514.full Misuse of standard error of the mean (SEM) when reporting variability of a sample]
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