tan1721 Tracker
https://communities.sas.com/kntur85557/tracker
tan1721 TrackerThu, 23 May 2024 22:33:32 GMT2024-05-23T22:33:32ZRe: What to do when our spam filter traps your post
https://communities.sas.com/t5/Community-Memo/What-to-do-when-our-spam-filter-traps-your-post/bc-p/916648#M537
<P>Hi, </P><P>my post was marked as spam. </P><P>could you please help @communities@sas.com.</P><P>The title is "sample size for the categories of a nominal variable".</P><P> </P>Sun, 18 Feb 2024 02:38:47 GMThttps://communities.sas.com/t5/Community-Memo/What-to-do-when-our-spam-filter-traps-your-post/bc-p/916648#M537tan17212024-02-18T02:38:47Zsample size for the categories of a nominal variable
https://communities.sas.com/t5/Statistical-Procedures/sample-size-for-the-categories-of-a-nominal-variable/m-p/916646#M45471
<P>I have a nominal variable with 3 categories. I am running a GEE model as the response variable is repeated in 2 scenarios. Following is a table with the sample size for both scenarios. As shown in the Table, the sample size for category 3 is only 6 and 1 in scenario 1 and scenario 2, respectively.</P><P>I searched in Google to find out whether it is possible to run multinomial GEE model with this small sample size but could not find anything. That is why I am reaching out to this community to learn if there is any requirement for sample size for every category of a nominal variable. </P><P> </P><TABLE><TBODY><TR><TD> </TD><TD>Category 1</TD><TD>Category 2</TD><TD>Category 3</TD><TD>Total</TD></TR><TR><TD>Scenario 1</TD><TD>18</TD><TD>10</TD><TD>6</TD><TD>34</TD></TR><TR><TD>Scenario 2</TD><TD>20</TD><TD>13</TD><TD>1</TD><TD>34</TD></TR></TBODY></TABLE>Sun, 18 Feb 2024 01:56:38 GMThttps://communities.sas.com/t5/Statistical-Procedures/sample-size-for-the-categories-of-a-nominal-variable/m-p/916646#M45471tan17212024-02-18T01:56:38ZRe: GEE procedure
https://communities.sas.com/t5/Statistical-Procedures/GEE-procedure/m-p/896090#M44413
Thank you!Wed, 27 Sep 2023 15:48:48 GMThttps://communities.sas.com/t5/Statistical-Procedures/GEE-procedure/m-p/896090#M44413tan17212023-09-27T15:48:48ZRe: outliers in GEE
https://communities.sas.com/t5/Statistical-Procedures/outliers-in-GEE/m-p/896089#M44412
<P>These are observation numbers. I have 34 observations from a driving simulator experiment. While did the analyses without these 2 outliers (2 and 26) and with these outliers, number of significant factors are higher when these 2 outliers are deleted. Considering this difference as substantial difference, should I include the results from both analyses?</P>Wed, 27 Sep 2023 15:48:15 GMThttps://communities.sas.com/t5/Statistical-Procedures/outliers-in-GEE/m-p/896089#M44412tan17212023-09-27T15:48:15Zoutliers in GEE
https://communities.sas.com/t5/Statistical-Procedures/outliers-in-GEE/m-p/896076#M44410
<P>I am fitting GEE model for a repeated measure dependent variable. Attached figure shows boxplots. My question is, is it necessary to delete the outliers (showing as star signs) to fit a GEE model with gamma distribution?</P><P> </P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="box.png" style="width: 815px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/88383i82559B3139A285E0/image-size/large?v=v2&px=999" role="button" title="box.png" alt="box.png" /></span></P>Wed, 27 Sep 2023 15:08:44 GMThttps://communities.sas.com/t5/Statistical-Procedures/outliers-in-GEE/m-p/896076#M44410tan17212023-09-27T15:08:44ZGEE procedure
https://communities.sas.com/t5/Statistical-Procedures/GEE-procedure/m-p/895575#M44398
<P>I am trying to fit GEE model and using "Proc GEE" method in SAS. This method gives "GEE parameter estimate" table. But "Proc GENMOD" also gives the "GEE parameter estimate". One difference I found is GENMOD procedure has the option to provide Wald statistics, but GEE procedure does not. Also, most of the journal papers in my filed (transportation) reported Wald statistics with their parameter estimate. Now, I am confused about two things: 1) should I use GENMOD procedure or GEE procedure? 2) should I report Wald statistics or Z statistic for GEE model?. </P><P>I have been searching in internet, but was not able to find out the answer. Help from SAS community will be highly appreciated.</P>Sun, 24 Sep 2023 13:29:45 GMThttps://communities.sas.com/t5/Statistical-Procedures/GEE-procedure/m-p/895575#M44398tan17212023-09-24T13:29:45ZRe: What distribution types should be specified for non-normal continuous data in GLMMs?
https://communities.sas.com/t5/Statistical-Procedures/What-distribution-types-should-be-specified-for-non-normal/m-p/891796#M44205
<P>It worked. I had to increase the iteration numbers as well.</P><P> </P><P>Thanks!</P>Wed, 30 Aug 2023 19:21:03 GMThttps://communities.sas.com/t5/Statistical-Procedures/What-distribution-types-should-be-specified-for-non-normal/m-p/891796#M44205tan17212023-08-30T19:21:03ZWhat distribution types should be specified for non-normal continuous data in GLMMs?
https://communities.sas.com/t5/Statistical-Procedures/What-distribution-types-should-be-specified-for-non-normal/m-p/891771#M44203
<P>Following is the histogram and Q-Q plot of deceleration data retrieved from driving simulator experiment. For this non- normally distributed data, I am using generalized linear mixed model to analyze the impact of gender and age on the deceleration rate. but the analysis is not working if I specify the distribution type as gamma, it is working only if I specify the data as normal. In that case, which distribution I should specify in GLMM? Does it become linear mixed model if the distribution is specified as normal in proc glimmix? <span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="bEVuY.png" style="width: 853px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/87330iA2C9DC1C455CBD25/image-size/large?v=v2&px=999" role="button" title="bEVuY.png" alt="bEVuY.png" /></span><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="BNpiv.png" style="width: 853px;"><img src="https://communities.sas.com/t5/image/serverpage/image-id/87331i964999B18651B94C/image-size/large?v=v2&px=999" role="button" title="BNpiv.png" alt="BNpiv.png" /></span></P>Wed, 30 Aug 2023 18:02:20 GMThttps://communities.sas.com/t5/Statistical-Procedures/What-distribution-types-should-be-specified-for-non-normal/m-p/891771#M44203tan17212023-08-30T18:02:20Z