topic How to use proc power to estimate sample size of Multiple Regressions? in Statistical Procedures https://communities.sas.com/t5/Statistical-Procedures/How-to-use-proc-power-to-estimate-sample-size-of-Multiple/m-p/58620#M2726 <HTML><HEAD></HEAD><BODY><P style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">The full regression model will look something like this, Y=b0+b1x1+b2x2+b3x3+b4x4 and all predictor variables(x1-x5) are <SPAN style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">continuous. </SPAN>I have no idea how many variables will be included in the final model. </P><P><SPAN style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">alpha will be 0.05. Before gathering data, I need to estimate approximately sample size. Can proc power do this?</SPAN></P><P></P><P><SPAN style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">Thanks.<BR /></SPAN></P></BODY></HTML> Sun, 19 Feb 2012 13:05:09 GMT MikeTurner 2012-02-19T13:05:09Z How to use proc power to estimate sample size of Multiple Regressions? https://communities.sas.com/t5/Statistical-Procedures/How-to-use-proc-power-to-estimate-sample-size-of-Multiple/m-p/58620#M2726 <HTML><HEAD></HEAD><BODY><P style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">The full regression model will look something like this, Y=b0+b1x1+b2x2+b3x3+b4x4 and all predictor variables(x1-x5) are <SPAN style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">continuous. </SPAN>I have no idea how many variables will be included in the final model. </P><P><SPAN style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">alpha will be 0.05. Before gathering data, I need to estimate approximately sample size. Can proc power do this?</SPAN></P><P></P><P><SPAN style="color: #000000; font-family: 'Times New Roman', serif; text-align: -webkit-auto; background-color: #ffffff; font-size: medium;">Thanks.<BR /></SPAN></P></BODY></HTML> Sun, 19 Feb 2012 13:05:09 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-use-proc-power-to-estimate-sample-size-of-Multiple/m-p/58620#M2726 MikeTurner 2012-02-19T13:05:09Z How to use proc power to estimate sample size of Multiple Regressions? https://communities.sas.com/t5/Statistical-Procedures/How-to-use-proc-power-to-estimate-sample-size-of-Multiple/m-p/58621#M2727 <HTML><HEAD></HEAD><BODY><P>Take a look at: <A href="http://www.ats.ucla.edu/stat/sas/dae/powerreg.htm">http://www.ats.ucla.edu/stat/sas/dae/powerreg.htm</A></P></BODY></HTML> Sun, 19 Feb 2012 15:20:17 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-use-proc-power-to-estimate-sample-size-of-Multiple/m-p/58621#M2727 art297 2012-02-19T15:20:17Z