Difference between the parallelism F test and Chi-square test

[#1]

Hello !

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.

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.

Thank you for your response !

[#2]

The two tests are provided for historical consistency. The basis for each test is described in the Fit Curve documentation. They are different tests, so they will likely yield different p-values.

Statistical errors are considered in the equivalence test.