https://communities.sas.com/t5/Statistical-Procedures/when-to-use-Games-Howell/m-p/614435#M29670 <P>You ought to have a look at box plots and diagnostic graphs.</P> <P>&nbsp;</P> <P>"...<SPAN style="display: inline !important; float: none; background-color: #ffffff; color: #000000; font-family: arial,'Arial Unicode MS',geneva,'Lucida Grande',sans-serif; font-size: 13.46px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 1.25em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">Levene’s test or any other test for homogeneity of variance should not be used as a diagnostic for the assumption of equal group variances that underlies the usual analysis of variance</SPAN>..."</P> <P>&nbsp;</P> <P><FONT style="background-color: #ffffff;"><A href="https://support.sas.com/documentation/cdl/en/statug/63347/HTML/default/viewer.htm#statug_glm_sect056.htm" target="_blank">https://support.sas.com/documentation/cdl/en/statug/63347/HTML/default/viewer.htm#statug_glm_sect056.htm</A></FONT></P> Mon, 30 Dec 2019 17:41:08 GMT Norman21 2019-12-30T17:41:08Z https://communities.sas.com/t5/Statistical-Procedures/when-to-use-Games-Howell/m-p/568248#M27981 <P><SPAN>Dear Sir or Madame,&nbsp;</SPAN></P><P><SPAN>I have performed&nbsp;</SPAN><SPAN>Levene's Test for Homogeneity and&nbsp;Welch's ANOVA. If alpha is 0.05, then&nbsp;Levene's Test for Homogeneity is NOT met wile Welch's ANOVA is met. My question is: what kind of post hoc test should i choose? Games Howell?</SPAN></P><P><SPAN><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Welch's ANOVA is not significant different.png" style="width: 600px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/30481iDBC6B1C4843923C4/image-size/large?v=v2&amp;px=999" role="button" title="Welch's ANOVA is not significant different.png" alt="Welch's ANOVA is not significant different.png" /></span></SPAN></P> Sun, 23 Jun 2019 21:15:19 GMT https://communities.sas.com/t5/Statistical-Procedures/when-to-use-Games-Howell/m-p/568248#M27981 L_Cai 2019-06-23T21:15:19Z https://communities.sas.com/t5/Statistical-Procedures/when-to-use-Games-Howell/m-p/614435#M29670 <P>You ought to have a look at box plots and diagnostic graphs.</P> <P>&nbsp;</P> <P>"...<SPAN style="display: inline !important; float: none; background-color: #ffffff; color: #000000; font-family: arial,'Arial Unicode MS',geneva,'Lucida Grande',sans-serif; font-size: 13.46px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 1.25em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">Levene’s test or any other test for homogeneity of variance should not be used as a diagnostic for the assumption of equal group variances that underlies the usual analysis of variance</SPAN>..."</P> <P>&nbsp;</P> <P><FONT style="background-color: #ffffff;"><A href="https://support.sas.com/documentation/cdl/en/statug/63347/HTML/default/viewer.htm#statug_glm_sect056.htm" target="_blank">https://support.sas.com/documentation/cdl/en/statug/63347/HTML/default/viewer.htm#statug_glm_sect056.htm</A></FONT></P> Mon, 30 Dec 2019 17:41:08 GMT https://communities.sas.com/t5/Statistical-Procedures/when-to-use-Games-Howell/m-p/614435#M29670 Norman21 2019-12-30T17:41:08Z