Hello, I would really appreciate your help on nested anova.
I would like to run a four level-nested anova in stata and my variables are
Dependent variable: Concentration
Factor A: Treatment [Two levels: 0, 1]
Factor B: Day [Five levels: 1, 2, 3, 4, 5]
Factor C: Animal [Five levels: 1, 2, 3, 4, 5]]
Factor D: Eye [Two levels: 0, 1 i.e. left vs right eye]
Basically there are two treatments, 5 days per treatment, 5 animals per day per treatment, 2 eyes per animal.
I am interested in whether there are significant differences in the mean concentrations of the two treatment groups.
First of all, is the following command
correct?
anova Concentration Treatment / Day|Treatment / Animal|Day|Treatment / Eye|Animal|Day|Treatment/
When I enter the data, I understand that Variables will be labeled in the following way:
Factor A: Treatment [0/1 variable]
Factor B: Day- Do I enter 1,2,3,4,5 OR 1,2,3,4,5,6,7,8,9,10?
Factor C: Animal-Do I enter 1,2,3,4,5 OR 1,2,3,4,5,....,50?
Factor D: Eye-Do I enter 0,1 OR 1,2,3,4,5.....,100?
And a third question, for a four level nested anova, do we need STATA SE instead of STATA IC (mat size larger for STATA SE)?
If my anova command is correct, and I find a significant result on any levels, is there a posthoc test that i can use after running nested anova?
Is there any other type of Anova I can use for this type of data?
Thank you very much in advance
I would like to run a four level-nested anova in stata and my variables are
Dependent variable: Concentration
Factor A: Treatment [Two levels: 0, 1]
Factor B: Day [Five levels: 1, 2, 3, 4, 5]
Factor C: Animal [Five levels: 1, 2, 3, 4, 5]]
Factor D: Eye [Two levels: 0, 1 i.e. left vs right eye]
Basically there are two treatments, 5 days per treatment, 5 animals per day per treatment, 2 eyes per animal.
I am interested in whether there are significant differences in the mean concentrations of the two treatment groups.
First of all, is the following command
correct?
anova Concentration Treatment / Day|Treatment / Animal|Day|Treatment / Eye|Animal|Day|Treatment/
When I enter the data, I understand that Variables will be labeled in the following way:
Factor A: Treatment [0/1 variable]
Factor B: Day- Do I enter 1,2,3,4,5 OR 1,2,3,4,5,6,7,8,9,10?
Factor C: Animal-Do I enter 1,2,3,4,5 OR 1,2,3,4,5,....,50?
Factor D: Eye-Do I enter 0,1 OR 1,2,3,4,5.....,100?
And a third question, for a four level nested anova, do we need STATA SE instead of STATA IC (mat size larger for STATA SE)?
If my anova command is correct, and I find a significant result on any levels, is there a posthoc test that i can use after running nested anova?
Is there any other type of Anova I can use for this type of data?
Thank you very much in advance
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