5/29/2023 0 Comments Graphpad prism 6 教程 twoway anovaTime would be a random factor if you picked those three time points at random. Time is considered to be a fixed factor if you chose time points to span the interval you are interested in. It would be a random factor if you were interested in differences between species in general, and you randomly selected those three species. ![]() If you were interested in those three particular species, then species is considered to be a fixed factor. To understand the difference between fixed and random factors, consider an example of comparing responses in three species at three times. ![]() ![]() Two-way ANOVA calculations are quite standard, and these comments only discuss some of the ambiguities.
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