# Questions tagged [anova]

ANOVA stands for ANalysis Of VAriance, a statistical model and set of procedures for comparing multiple group means. The independent variables in an ANOVA model are categorical, but an ANOVA table can be used to test continuous variables as well.

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### Post hoc test 2x2 design

I have a relatively simple 2x2 design. I give a hypothetical example. I have a continuous variable Y (Plant Growth) and I have 2 factors with 2 levels; Temperature (warm/cold) and Condition (...
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### anova from likert scale data

I want to ask. I need to run repeated measure anova. Study of the effects of diff audio on awe experiences. I have 3 audio. Now i already put the data ( awe scale- likert ) and already got the sum of ...
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### Correct method of creating a repeated measures ANCOVA in r

I am attempting to build a 3x2 repeated measures ANCOVA in R where the same participants were measured 6 times using 2 different intervention combinations. 6 demographic covariate questions were ...
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### Some of my data is not normally distributed, what test should i use?

I am testing dating profile information and whether wanting children (yes, no, maybe) has an effect on how many attributes the seekers ask for. When testing for normality and homogeneity of variance ...
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### Two-way ANOVA statistical test for statistical comparison of data? Suitable?

hope everybody is good during this period. I was trying to run two-way ANOVA test for my sample, but further I go with script in R I feel less confident that this is the best way to analyze my data: ...
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### How to follow-up a repeated measures ANOVA with 1 between and 4 within-subject factors?

I'm having trouble determining the best way to follow-up the results of my repeated measures ANOVA with 1 between (group) and 4 within (time x IV A x IV B x IV C) factors. Time is pre-test, post-test ...
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### What statistical analysis for this group

I know it's basic statistics but I am lost, I would like to check if the difference between group FEMALE and group MALE is statistically significant but I am stuck with all the definitions the groups ...
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### RM Manova follow up - Unvariate or discriminant analysis?

I have a one-way repeated measures manova with participants measured on 2 DV's (both aspects of language quality) and one within subjects IV (condition). Participants were all tested over 4 conditions....
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### Post-hoc test for One-Way Repeated Measures ANOVA

I need some help in understanding what kind of post-hoc test I would need to run after an ANOVA. Let's suppose that I have only 1 group of subjects and as independent variable I have "Condition". "...
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### Insignificant result with one-way anova but significant with two-way anova?

I'm working on lung dataset of ISwR package in R. A book by Peter Dalgaard, has assigned me to answer this question: 7.2 In ...
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### why anova() function is not applicable for models build using ridge regression and lasso regression in R?

linRidgeMod <- linearRidge(Class ~ ., data = training[,vars]) anova(linRidgeMod) or ...
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### Which ANOVA method to use to compare variance explained between four lmer (linear mixed effects) models in R

Suppose I have four linear mixed effects models as shown: ...
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### Testing for interactions using the aligned rank transformation test (non-parametric two-way ANOVA)

I am completing an aligned rank transformation as follows, using the ARTool package: ...
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### Why do anova(lmer) and aov give different results also from Matlab anova?

I am running a LME analysis, with pupil_mean_bin as dependent variable, cond and phasetype as fixed factors and subj as random factor. I need to know the F values for this model, but I noticed that ...
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### What type of ANOVA test should I use?

I have 2 independent categorical variables with 2 groups each, say ind_1 -ind_1a -ind_1b ind2 -ind_2a -ind_2b The outcome variable is quantitative and is measured at ...
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### What test exactly does lm.anova perform in R?

I have always thought that anova(myFit) performs submodel test for each regressor in the model (i.e. comparing model with all regressors with model without the ...
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### What is repetition in ANOVA?

I came across an explanation here, which states Itās whether you are replicating (i.e. duplicating) your test(s) with multiple groups. With a two way ANOVA with replication , you have two groups ...
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### What is the “Mean Sq” column of “Residuals” in “anova” of a linear model in R?

Here is anova output from a linear model: ...
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### Anova with unequal variances and sample size or multiple t-test

I am currently working on cross country average incomes. More specifically, I have figures for the average income in Germany, Spain, Italy and France. I need to test whether average incomes are ...
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### One Way ANOVA or One Way ANOVA with repeated measure

I have LFS spanning 24 quarters, and I want to look at the effect of a policy on the sickness absence of a particular occupation. I want to use ANOVA to see if there is a statistically significant ...
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### ANOVA results reject null hypothesis for all samples, is it normal?

I have done ANOVA analysis of the experimental test data on Matlab. The test data is about the flexural strength of products made from different mixes. Within each design mix, only one of the ...