https://community.jmp.com/t5/Discussions/Difference-between-the-parallelism-F-test-and-Chi-square-test/m-p/751999#M93333 <P>Hello !</P><P>I want to test the parallelism between two 4pl curves but I do not understand what the difference is between the F test and the Chi square test? The F test provides a p-value that is superior to 0.05 while the chi-square test does the opposite. I assume I cannot just pick one.</P><DIV class="">&nbsp;</DIV><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="aschmitz1_1-1714759010668.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/63921i08382931690DBD7C/image-size/medium?v=v2&amp;px=400" role="button" title="aschmitz1_1-1714759010668.png" alt="aschmitz1_1-1714759010668.png" /></span></P><P>&nbsp;</P><P>&nbsp;</P><P>I was also wondering if it was possible to include the variability due to the random error when analysing 4 pl curves with the equivalence test.</P><P>&nbsp;</P><P>Thank you for your response ! :)</img></P> Fri, 03 May 2024 17:58:19 GMT aschmitz1 2024-05-03T17:58:19Z https://community.jmp.com/t5/Discussions/Difference-between-the-parallelism-F-test-and-Chi-square-test/m-p/751999#M93333 <P>Hello !</P><P>I want to test the parallelism between two 4pl curves but I do not understand what the difference is between the F test and the Chi square test? The F test provides a p-value that is superior to 0.05 while the chi-square test does the opposite. I assume I cannot just pick one.</P><DIV class="">&nbsp;</DIV><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="aschmitz1_1-1714759010668.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/63921i08382931690DBD7C/image-size/medium?v=v2&amp;px=400" role="button" title="aschmitz1_1-1714759010668.png" alt="aschmitz1_1-1714759010668.png" /></span></P><P>&nbsp;</P><P>&nbsp;</P><P>I was also wondering if it was possible to include the variability due to the random error when analysing 4 pl curves with the equivalence test.</P><P>&nbsp;</P><P>Thank you for your response ! :)</img></P> Fri, 03 May 2024 17:58:19 GMT https://community.jmp.com/t5/Discussions/Difference-between-the-parallelism-F-test-and-Chi-square-test/m-p/751999#M93333 aschmitz1 2024-05-03T17:58:19Z https://community.jmp.com/t5/Discussions/Difference-between-the-parallelism-F-test-and-Chi-square-test/m-p/752011#M93334 <P>The two tests are provided for historical consistency. The basis for each test is described in the <A href="https://www.jmp.com/support/help/en/18.0/#page/jmp/test-parallelism.shtml#" target="_self">Fit Curve documentation</A>. They are different tests, so they will likely yield different <EM>p</EM>-values.</P> <P>Statistical errors <A href="https://www.jmp.com/support/help/en/18.0/#page/jmp/equivalence-test.shtml#" target="_self">are considered</A> in the equivalence test.</P> Fri, 03 May 2024 18:53:16 GMT https://community.jmp.com/t5/Discussions/Difference-between-the-parallelism-F-test-and-Chi-square-test/m-p/752011#M93334 Mark_Bailey 2024-05-03T18:53:16Z