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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interaction effect on consecutive gestures from different sets

I am conducting an within-subject experiment in which each participant has to perform 2 consecutive gestures with one arm. (with repetitions). To make it simple, let's say that I have 2 sets of ...
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Interpreting conflicting hypothesis results from anova test

I've created a test where a participant plays a game and must maneuver as many 3 pointed stars to the right side of the screen and 4 pointed stars on the left as they can within a time limit. The test ...
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What is the difference between a 2x2x2 split plot ANOVA and a 2-way repeated measures ANOVA? [duplicate]

What is the difference between a 2x2x2 Split-Plot ANOVA and a 2-Way Repeated Measures ANOVA?
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How to asses significant differences in between participant pretest posttest design?

So, the groups would be control group and experiment group. The scale used is ratio. Both will be given pretest and posttest. So, how should I assess the differences between control group and ...
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Testing interactions with non-normal ordinal data

I am testing a hypothesis in which my scale DV (PSS) is predicted by an interaction between an Ordinal DV and a scale IV. The ordinal IV is TF (Total Freq) The scale IV is and PQM (Practice ...
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Testing significant difference of correlation matrices

I'm interested in exploring whether responses to a series of attitudinal questions differ across various countries. I could check significant difference in mean scores but am more interested in the ...
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Can linear regression slopes be used as covariates in an univariate ANOVA?

Sorry if this has been asked before but I've searched a lot without luck! The closest thing was the following question, which partly answers my question: Can slopes in linear regressions be used as ...
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Is there a consensus on adjusting alpha for multiple contrasts if the main effect is significant?

After talking to a couple of statisticians, reading some book sections, internet articles, and forums like this, I am still unclear about multiplicity adjustments of post hoc tests and contrasts. ...
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14 views

Multiple comparison for model fit with glmer

I would like to use glmer to fit a model of seed count data, and then compare the means from each plant line at two different temperature regimes. I am really not sure how to go about doing the ...
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7 views

Relative Proportion of Variance for each Factor (ANOVA)

I'd like to calculate how much of the variance is related to each of the input factors. For example (in this case some R-code), if one wants to calculate how much of the "Magic Effect" of a magic ...
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21 views

4 way anova? 5 way anova? What is it?

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Most appropriate test for my data?

I am strugling with my current science project on how to determine statistical significance among my tested groups. I have however a very basic understanding of statistics and would like to understand ...
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Can I use a covariate in a RM-ANOVA design and can the covariate be ordinal?

I'm having some trouble deciding what the best approach is to may data. The following is the setup of the study: Between-subjects factor: Group (2 levels) Within-subjects factors: Time (2 levels), ...
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How should you perform a manipulation check for multiple items that should belong to one of two groups?

Suppose I have 8 creatures that participants rate on my YuckFactor scale. I chose 4 cute animals to be part of a LowYuck group and 4 ugly bugs to be part of the HighYuck group. How can I test that ...
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independent component analysis of given signal

let us consider following signal x = 0:pi/100:10*pi; s1 = sin(0.2*x); s2 = sin(2*x); x1 = 0.1*s1+0.9*s2; x2 = 0.9*s1+0.1*s2; generally in case of ...
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Confounding factor in cross-validation

I have been exploring a dataset using support vector machines. I am solving a binary classification problem and using stratified K-fold cross-validation for performance estimation (the SVM ...
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14 views

How to report the group means and TukeyHSD for an ANOVA without intercept in R? [closed]

I would like to run a Two-Way ANOVA without the intercept, and be able to report the grand and group means, and run TukeyHSD. However, I would receive this error. ...
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37 views

Anova (missing F statistics), Ancova and mixed modelling on nested dataset

I am performing an analysis in R and wonder how to do it since different methods return very different results. My dataset contains Samples and SubSamples as nested random effects and Type, Dose and ...
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23 views

ANOVA with single degrees of freedom

I was running ANOVA. Does it make sense to use a variable with 1 degree of freedom as independent variable?
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Repeated measures anova and split plot design analysis

It is mentioned that repeated measure anova may be very similar to split-plot design: Is a "split plot" ANOVA with two factors the same as two-way ANOVA with repeated measures in one ...
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Error term in anova

There is an example on this page (last part): http://www.personal.psu.edu/mar36/stat_461/split_plot/split_plot.html Different rats have been fed with food and glycogen in liver was tested: 6 rats; 1 ...
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one way anova in R

I have only just started using R in my first year at university and I am completely stuck. I have done an anova test as the data is normally distributed and parametric. However, this is my result. I'm ...
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1answer
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What is the difference between the standard errors calculated by predict.lm() and summary.lm()

I am trying to calculate standard errors of group means for a two-way-anova. I found two ways to do this (predict.lm(, se = T) and ...
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In a two-way ANOVA, F-statistic for one factor is less than one and not significant. Much higher in t-test?

I conducted a two-way ANOVA (factors=season of birth and ethnicity) and found that the effect of ethnicity (Pakistani and White British) did not have a significant effect on child weight F(1, ...
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27 views

Mixed way ANOVA

I have two variables (group, achievement level). I want to check the effect of an intervention on different achievement levels. For example, I want to check whether there is an increase in achievement ...
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42 views

Exploratory data analysis for a dataset with continous and categorical variables

I have a data set which has DV and around 40 IVs. I want to select best variables out of the existing ones. I can use correlation, but it requires only numeric variables. I would like to see relation ...
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Repeated measures analysis where fixed effect changes within subjects

I have sales data from a set of stores that are involved in a tournament-like competition where each week's average invoice amount is used to determine whether or not a store advances to the following ...
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38 views

ANOVA Omnibus F-Test

I ran an ANOVA test on some data. The Omnibus F-test comes back with a P-value of 0.3726. I was taught that this means that none of the individual variables would show as significant. But one of my ...
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Alternative to an ANOVA

I'm currently attempting to run statistical analysis on data from an experiment but have encountered an issue. The number of participants is very low (8 in total) and there are 27 conditions after ...
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Randomized Complete Block Design - Scheffe Multiple Comparisons

I'm working on a problem in Design and Analysis of Experiments by Dean and Voss. It's Chapter 10 question 11 part c. We have an experiment with 2 treatment factors (each with three levels) and 1 ...
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EMMEANS Pairwise Comparison OR Post Hoc Multiple Comparison?

I was running a 2-way Univariate ANOVA, and there are two tables in the results that compair the 3 levels of one of my IVs (Transformation_Model). Under Estimated Marginal Means, the table is titled ...
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35 views

Confused about whether to use t-tests or ANCOVA or ANOVA

I am investing whether vitamin C supplementation can attenuate creatine kinase increases after a strenuous workout. My participants are divided into two groups, VitC group and a Control (no ...
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Interpretion of ANOVA with Nested Design

The following scenario is a basic nested design. I am trying to wrap my head around the interpretation of the ANOVA Table. Scenario: A school administrator is looking to investigate 5th grade ...
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20 views

ANOVA Table for Model In R

I'm trying to figure out how to produce an ANOVA Table in R for a multiple regression model. So far I can only produce it for each regressor, and the Mean Square is calculating as the same as Sum Of ...
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Calculating P- value

In ANOVA table , I got $F$-statistic $=330.285$ degrees of freedom (df) due to regression $= 6$ Error degrees of freedom $= 9$ But i don't know how to calculate $p-$value ? I have tried in ...
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Difficulty choosing the right type of analysis

I have to write a proposed methodology for a study investigating the cognitive effects of beetroot. I will be using 2 separate groups of participants. I will first take their resting blood pressure ...
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Determining whether to use one line or two in linear regression

Basically I'm attempting to recreate the results of an example from class in R. What I'm trying to do is decide whether it's best to use a single regression line for an entire data set or two lines ...
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21 views

What type of ANOVA should I use?

I'm currently conducting a study with two objectives. The primary objective is to assess the influence of using different recovery modalities on repeated sprint performance in youth footballers. To do ...
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Intraclass Correlation Coefficient value range vs strength of association

I read on this site that ICC is a good measure of association(effect size) between nominal and interval data..and the significance test suggested was anova...My question is, given the association is ...
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retrospective kpi study

I have data about a business that looks like: actions: <timestamp, # responses, cat1, cat2> where each action can generate 0 up to perhaps 20 responses. ...
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Geometric Interpretation of Orthogonal Contrasts in ANOVA

I was trying to understand orthogonal contrasts in ANOVA following the article by Harry M. Schey "A Geometric Description of Orthogonal Contrasts in One-Way Analysis of Variance" in The American ...
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A question about multifactor anova

I am trying to look to see if there is any effect of temperature, family, cross type and genotype on photosynthesis rate. So here, photosynthesis rate is a response variable and the rest of them are ...
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1answer
25 views

Is it possible to run ANOVA using Mean differences?

I'm wondering whether it is possible, and how to run an ANOVA on mean differences rather than on means. I want to run a 2*3 ANOVA on multiple comparisons. I'm wondering if I should treat each ...
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Running a Two-Way Repeated Measures ANOVA with missing data

I'm trying to run a Two-Way rep measures Anova on a data set with two independent variables, and three time factors for each variable. However due to the severity of the experiment, not all ...
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Testing differences of multiple means and variances

Does ANOVA tests the pairwise difference of multiple means at once, or is there any method to test the pairwise difference of multiple means or variances at once?
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How to interpret ANOVA result?

I'm doing a research on factors affecting organizational culture in a company and in order to test my null and alternate hypothesis I was asked to use ANOVA on SPSS. This is the result I got for doing ...
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35 views

What kind of research design is this, is it even possible? If so, how to go about analyzing it?

This is for a psychology design. I have 2 groups, all members of both groups are to be administered all tests. I think that I want to do a 3x2 factorial ANOVA on the DIFFERENCES in the means of my ...
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39 views

Degrees of freedom in ANOVA

Is there an algorithm to calculate the degrees of freedom for any given effect or interaction as well as the 'error' in any ANOVA design with or without repeated measurements, such that I don't have ...
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1answer
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Why do we make a F-Test rather than a Beta-Test in ANOVAs?

When one performs an ANOVA, (s)he always end up calculating the observed F-ratio and comparing it to the appropriate F-distribution. From this post, I discovered that the coefficient of correlation ...