# Tagged Questions

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### Difference between MANOVA and two-way ANOVA

I have read the articles of both of these statistical methods on wikipedia, and as far as I can tell they are used in the same cases. I could not tell in how far they work the same way, since the ...
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### Methodology for finding source of MANCOVA interaction

I am trying to find out the best method for determining the source of a significant MANCOVA interaction. I have 17 traits measured for four locations. Is there an alternate to univariate ANCOVAs ...
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### Two independent groups and three dependent variables

How do I test for differences between two groups on three dependent variables? Is that an ANOVA or multiple t-tests with an adjusted alpha level?
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### Proper methods for this case of repeated measures?

I am measuring hormone changes in animals. I have three groups: Groups A, B, and C. In each group, blood was collected from the SAME individuals for hormone assay at 0, 15, 30, and 60 min. This was ...
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### Finding interaction between several factors and multiple dependent variables

Asking a question essentially for a colleague, since it's far enough afield of what I do that I want to make sure I don't lead her astray: Assume a study with 5 factors and 3 dependent variables - ...
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### ANOVA type for dependent samples through time

The problem is how best to analyse data which involves multiple dependent measures, taken on multiple/repeated occasions and determine whether there's a difference between two groups. I'm trying to ...
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### Number of dependent variables

I have data from raters who each provided two ratings for a large set of categories. They were asked to rate how coherent each category was on a scale of 0 (members totally dissimilar) to 9 (members ...
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### Why is it possible to have a non-significant MANOVA but multiple significant univariate ANOVAs?

The only source I have for this being possible is http://en.wikiversity.org/wiki/Multivariate_analysis_of_variance, but this page does not explain why it is possible.
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### “effects not estimable” error in R aov

I have data on the effect of treatment on leg shaking. I reused several individuals so I want to know Is there a significant effect of treatment on shaking Do the reused individuals present some ...
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### 2 x 3 Intervention Study Design

I have an intervention that I want to test and I am a little bit "statistically challenged." There will be two groups (treatment and control) over three periods of time (pre-test, post-test, and a ...
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### Test for 1 IV, 2 DVs, with multiple samples from each subject

I have a set of data with 1 independent variable (IV, categorical), and 2 dependent variables (DV, continuous). Multiple samples were obtained from each subject with variable sample size, and one of ...
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### MANOVA vs. Repeated Measure ANOVA

Thanks for your time. I want to compare accuracy of several predicting models. I am comparing their MAE. each model use same all or some predictors. Which approach is better MANOVA or repeated measure ...
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### What is the nonparametric variant of multivariate ANOVA with more than one one factor (and with interactions between factors)?

I analyze real data where assuptions of classical multiway (more than one factor assumed) MANOVA (more than one response variable) are not met (normality, equal variances). Is there any nonparametric ...
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### Repeated measures ANOVAs instead of repeated measures MANOVA w/ small N?

I have 3 variables that have been measured on 4 occasions and a sample size of 16. I was considering a repeated measures MANOVA to ascertain if the changes over time were statistically significant. ...
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### Difference between MANOVA “post-hoc” tests of between subjects effects and between subjects one-way ANOVA?

When I run a 2x4x5x6 (Sex*AgeGroup*HighestDegree*Ethnicity) MANOVA (with 20 dependent variables) in SPSS, it presents tests of between subjects effects for each of the IVs and their interactions after ...
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### Variables which sum to a constant - ANOVA, MANOVA or none of these?

I asked a group of subjects to make a series of 12 binary choices regarding preferences. Let's say for arguments sake, these were between ugly (ug), attractive ...
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### Multiple dependent variables in factorial design

I have a 2x2x2 factorial design with two dependent variables (lets say height and weight). I can examine the effect of the three factors for each dependent variable separately. But I also want to ...
2k views

### How to interpret type I (sequential) ANOVA and MANOVA?

My primary question is how to interpret the output (coefficients, F, P) when conducting a Type I (sequential) ANOVA? My specific research problem is a bit more complex, so I will break my example into ...
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### Over enthusiastic MANOVA in R

In recent research I pursue a MANOVA model on a dataset comprised of 50 measured characters and several grouping factors that I need to test. When I use something like this ...
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### Differences between MANOVA and Repeated Measures ANOVA?

What is the difference between a repeated measures ANOVA over some factor (say experimental condition) and a MANOVA? In particular one website I stumbled across suggested that MANOVA does not make ...
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### Consequence of violating independence assumption of ANOVA

I would like some help with the following problem. I have 40 subjects. On each subject I take a measurement at 25 body sites. The measurement is a continuous variable that varies between 0 and 1 and ...