topic sample size calculation for Chi-squared test in Statistical Procedures https://communities.sas.com/t5/Statistical-Procedures/sample-size-calculation-for-Chi-squared-test/m-p/899181#M44564 <P>Hi,</P><P>My data has a categorical independent variable (3 groups) and a dicohotomous (yes/no) dependent variable. I was planning to use a Chi-squared test to see if there is a difference between the groups. However I first need to calculate the sample size, since I didn't find a way to do this in SPSS I am trying to do this in SAS studio.</P><P>Is this the correct test to use for my data types or are there better tests to do it? How do I calculate the sample size if the alfa is 0.05, the power is 0.80 and I have a 3X2 tabel as described above?</P> Wed, 18 Oct 2023 21:39:00 GMT froji 2023-10-18T21:39:00Z sample size calculation for Chi-squared test https://communities.sas.com/t5/Statistical-Procedures/sample-size-calculation-for-Chi-squared-test/m-p/899181#M44564 <P>Hi,</P><P>My data has a categorical independent variable (3 groups) and a dicohotomous (yes/no) dependent variable. I was planning to use a Chi-squared test to see if there is a difference between the groups. However I first need to calculate the sample size, since I didn't find a way to do this in SPSS I am trying to do this in SAS studio.</P><P>Is this the correct test to use for my data types or are there better tests to do it? How do I calculate the sample size if the alfa is 0.05, the power is 0.80 and I have a 3X2 tabel as described above?</P> Wed, 18 Oct 2023 21:39:00 GMT https://communities.sas.com/t5/Statistical-Procedures/sample-size-calculation-for-Chi-squared-test/m-p/899181#M44564 froji 2023-10-18T21:39:00Z Re: sample size calculation for Chi-squared test https://communities.sas.com/t5/Statistical-Procedures/sample-size-calculation-for-Chi-squared-test/m-p/899185#M44565 <P>You can do this either with the POWERRxC macro or with PROC POWER. Both are illustrated for a 4x2 table in Example 3 in the Results tab in the <A href="https://support.sas.com/kb/25/013.html" target="_self">POWERRxC macro documentation</A>.</P> Thu, 19 Oct 2023 00:40:44 GMT https://communities.sas.com/t5/Statistical-Procedures/sample-size-calculation-for-Chi-squared-test/m-p/899185#M44565 StatDave 2023-10-19T00:40:44Z