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    How to show statistical equivalence between groups of data?

    Thanks for the response. I tried to do a TOST but I think I did it wrong because my two p-values were the same. So to perform a TOST, you first take the difference between the data sets, then run the one-tailed t-test on the difference? Is that correct? I didn't take the difference first...
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    How to show statistical equivalence between groups of data?

    I'm trying to determine if these two groups of data are equivalent. How do I show that mathematically? I have conducted an experiment in which three samples were each measured at two time points as shown in the image. I would like to compare these data and demonstrate (with some sort of...