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How to interpret Repeated Measures Anova Example Table

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deejt on 31 May 2021
Commented: deejt on 3 Jun 2021
Hello community,
I have a specific question to the Matlab example of repeated measures anova. Its the first example Repeated Measures Analysis of Variance with fisheriris
The following is the output table. Now I was wondering, what is the difference between the rows "(Intercept):Measurements" and "species:Measurements" and how would I interpret the two rows?
Thank you for your help!
ranovatbl=3×8 table

Accepted Answer

Jeff Miller
Jeff Miller on 31 May 2021
(Intercept):Measurements is the "main effect" of measurement type--a factor with 4 levels in this example (i.e. length and width of sepals and petals). The significant F for this line indicates that the average values of these 4 types of measurements differ.
species:Measurements is the term for the interaction of species by measurements. The significant F for this line means that the patterns of differences among the 4 measurement types differ across the three species. Equivalently, it means that the pattern of differences among the three species differ across the four measurement types.

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