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Questions tagged [mancova]

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22 views

Multiple ANCOVAs: Post hoc Bonferroni, FDR, or can I use MANCOVA?

I am comparing a protein level in multiple (40 to 4000 depending on the analysis) brain areas across three diagnostic groups, with a couple of covariates. I am using ANCOVA to compare the three groups....
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19 views

Which should I use here ANCOVA or MANCOVA?

I have 5 Dependent variables which are: (four creativity skills and its total), my research Hypotheses are as follow: H01: There are no statistical differences in Pretest and Posttest scores between ...
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18 views

Difference between MANCOVA and multiple ANCOVAs

I am analyzing the volumes of 13 different regions in the brain in a longitudinal (baseline and followup) study. I have two groups of participants - the therapy group and control group, and two time ...
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1answer
25 views

Choosing Statistical Test for my dataset

I was wondering if someone could help me. I have a dataset from a clinical trial which tests the impact of therapy on a group of cannabis users with psychotic symptoms. It's a randomised control trial ...
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1answer
81 views

Am I fishing for significance?

If my multivariate analysis of covariance shows that my covariate does not account for significant differences is it wrong to follow up with a standard multiple regression? I know MANCOVA is under the ...
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1answer
45 views

What is the best statistical test for this data with multiple predictors?

have a set of data as follows where we measured the change in aluminium or copper according to time, concentration of sediment, temperature and the site the water was taken from. Here is a sample of ...
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172 views

Do I need to use a Bonferroni adjustment after a MANCOVA?

My thesis supervisor insisted I do a MANCOVA with 5 dependent variables. However to answer my research questions I need to use the results of the subsequent 5 univariate tests SPSS automatically ...
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2answers
92 views

Which statitical modeling in more appropriate when there are several yi? (MANCOVA,Multivariate regression, canonocal correlation)

I have these variables in my data set: a categorical variables with 5 levels (Country) sex a continuous variable (grade) ...
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2answers
350 views

Dependent variable with two dimensions; which statistical test is appropriate?

I do have a dependent variable with two distinct dimensions (factors). In total the dependent variable do have 10 items. The first 5 items belong to dimension 1 (as sub-dimension of the overal ...
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1answer
355 views

MANCOVA homogeneity of regression slopes

I am examining the difference in illness models (by asking several questions: DV) for refugees and non-refugees (IV). In addition, we asked about several confounding variables / covariates (...
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36 views

Data analysis for two groups?

I have a data set for two groups i.e. control group and treatment group. They are two different group from the same socio-economic background. But the treatment group has participated in co-management ...
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0answers
270 views

Interpreting/Reporting means for a MANCOVA

I did a study on whether people have a chronic illness (dichotomous variable, 1 or 0) and several measures of psychological well-being. Two questions: 1.) Does one report the means of the raw scores (...
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1answer
207 views

How to measure variance in a classification dataset?

I have a dataset that contains 20 predictor variables (both categorical and numeric) and one target variable (2 classes - Good and Bad). But, there are only 23 observations in the dataset. While I ...
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1answer
261 views

Is it ok to repeat MANCOVA until all interactions are significant

In order to enlighten the relation of three (related) scales describing psychopathology (1 anxiety score and 2 shame scores) with demographic data (gender, place of residence, age etc) collected by ...
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22 views

covariate in ANCOVA

I have two groups I want to compare- drug and placebo- on a few dependent variables from neuropsychological tests. I ran a MANCOVA using only one covariate (related to the DV) and I found two out of ...
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884 views

How to perform a MANCOVA in R

I have been looking around and cannot figure out how to perform a Mancova in R. independent variable: cluster number dependent variables (multivariate): body shape (19 partial warp scores) covariate: ...
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27 views

Paired test with 2 dependent variables

What test should I use to find out what effect an intervention has on two dependent variables? I have a test group of clinically depressed that will undergo a sports program. The program is expected ...
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0answers
170 views

What does the p value for a covariate in a two-way ANCOVA (or factorial ANCOVA) really mean?

Given that the covariate aims to reduce the variance in the error term, what does the p-value mean for a covariate in a two-way ANCOVA? I assume the "correction" is applied no matter what the p-value ...
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1answer
523 views

How can I conduct a non-parametric version of MANCOVA in R?

Is it possible to transform my variables to their ranks and apply MANCOVA to the transformed data, just like how it is done in rank ANCOVA?
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117 views

Non normally distributed data and comparing correlation

I have data from a research that was conducted by me, the data refer to four conditions made of two levels of time (pretest and post-test) and two levels of group (control and intervention). Shapiro-...
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48 views

Which statistical method can I use to see if there is a correlation between data sets with different size?

For my thesis I want to compare the 3 different test results. If the results are more than 5, samples are failed. And I want to show if these tests are similar behaviour (if there is a correlation ...
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212 views

Univariate tests of a multivariate model (MANCOVA)

When running multivariate analysis with covariance, the multivariate tests showed all covariates not to be significant, but the grouping variable was significant. When moving onto univariate tests (...
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1k views

MANCOVA reporting

I just ran a MANCOVA to compare my grouping variable with my dependent variables whilst controlling for my covariates. I am running a descriptive study, therefore already by looking at descriptive ...
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1answer
222 views

Working on my dissertation, and need to figure out whether to use MANOVA, MANCOVA, Multiple regression, or multivariate regression

I am working on my dissertation, and I am having a hard time choosing a statistical model to follow. I am using an existing dataset. The results of the dataset are self-reported. There are more than ...
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255 views

MANCOVA with categorical moderator - it is possible?

I have two continuous variables which are my DEPENDENT variables and two PREDICTORS which are continuous too, but I need to test with MANCOVA an interaction of a third variable (moderator), which is ...
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1answer
12k views

How to do MANCOVA in R?

I have two groups of persons, GRP0 and GRP1, on which I measured three continuous variables: VAR1, VAR2 and VAR3. I would like to use Mancova in R with: - VAR1, VAR2 and VAR3 as outcome variables - ...
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1answer
390 views

What is the intuition behind (M)ANCOVA and when/why should one use it?

As per my understanding here's the what/why/when of the following hypotheses tests in a crude sense: t-test: Used when comparing means between two samples ANOVA (one way): Used when you have one ...
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1answer
555 views

MANCOVA or several ANCOVAS

I am analyzing pre- and post- intervention data for which I have 6 dependent variables for two groups (treatment, no treatment). I want to know if, controlling for pre scores from the 6 measures, post ...