ANOVA

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Questions related to ANOVA

How are multiple zero values treated in trend analysis?

I am using Mann-Kendall test and Sen slope to assess the trends in monthly rainfall datasets for 64 years, e.g., Jan 1957, Jan 1958, ..., Jan 2020. Since the region is a semi arid one, there are a...

22 December 2021 1,193 8 View

How to analyze this experiment (unusual design)?

Hello, I am a student conducting an experiment and have a rather unusual question about data analysis. For your understanding, a few notes about the experiment: Between-subjects design One...

20 December 2021 3,795 2 View

Can data distribution be accurately assumed when n<6? And thus can parametric tests (t-test, ANOVA) be used if n<6?

Hi, We received a statistical reviewer comments on our manuscript and one of the comments goes as follows: '... Note that common tests of normality are not powered to detect departures from...

18 December 2021 8,871 6 View

If I want to explore my data more generally (over and above the specific hypotheses I had when I designed my experiment), what are the main tests?

If I want to explore my data more generally (over and above the specific hypotheses I had when I designed my experiment), what are the main tests I should consider? 1. Tukey HSD 2.REGWQ 3....

08 December 2021 7,988 3 View

Why same two variables have significant relation (P<0.05) in Correlation coefficients results but non-significant (p>0.05) in ANOVA? Kindly guide?

How can i interpret my results in discussion as these are main variables for my research project?

07 December 2021 3,371 5 View

Two way repeated measured ANOVA?

If I have certain score then measured it individually, grouped , teamed scoring, for 2 groups experimental one and controls , Can I apply 2 way repeated measured ANOVA or not? I have 2 groups...

06 December 2021 134 5 View

How to interpret contradictory results between ANOVA and multiple pairwise comparisons?

I have 2-way repeated measures ANOVA [two within subject factors, 1st "time" (pre vs. post) and 2nd "limb" (left vs. right)]. There was a significant interaction between time and limb. Post hoc...

01 December 2021 3,021 18 View

Residuals from Generalized Procrustes Analysis?

I am planning a study using concept mapping that will involve procrustes analysis to compare across group visualizations, and I am wondering if it is possible to analyze the residuals or consensus...

30 November 2021 9,756 3 View

Is it necessary to use paired statistical tests for my data?

I am currently comparing three different methods for the same samples with a "success" or "failure" outcome for each method. Cochran's Q would be the ideal test for this data according to my...

30 November 2021 913 4 View

What do you use for text data analysis (i.e., speech)?

Dear RG Community, I am looking for options as I plan to analyse speeches. Is there any suggestions in terms of tools to analyse speeches (text data)? Thank you.

30 November 2021 7,756 5 View

Comparing multiple groups (age, employment status, psychological disorder etc.) at two time points on a single continuous questionnaire score (1 DV)?

I would have up to 8 independent variables (e.g., BMI, age, gender, educational level, psychological disorder, etc.), and I would measure these groups at two timepoints (pre- and post-treatment)....

25 November 2021 7,305 3 View

Best alternative solution to ANOVA?

We have 50 subjects and each of them has multiple measurements of a variable, X, in three different conditions. the three conditions are low, medium and high. We want to evaluate whether there...

24 November 2021 9,410 9 View

Paired t-test or repeated measures ANOVA test?

Dear colleagues, For my master's thesis, I am experimenting on three different groups of which I have recorded the weight before and after a particular treatment. I am confused as to whether I...

21 November 2021 4,122 11 View

Which statistical test is the most adequate?

Consider a within-subjects study where each participant executes tasks (5 levels) in each visualisation (3 levels). As such, there are two independent variables: the task and the visualisation....

19 November 2021 5,228 4 View

Regression with a dependent categorical variable?

Hi I have two variables: - Age (continuous independent variable) - Score (a categorial dependent variable between 0 and 6) What is the correct type of regression analysis to use in this...

16 November 2021 9,433 3 View

Can you suggest a reference about reverse coding/scoring in surveys?

Do you have one or more reference resources that you can recommend for the necessity of reverse coding/scoring in surveys?

16 November 2021 475 5 View

Can I remove a interaction term in Two way ANOVA if the interaction term were non-significant?

Dear everyone. I recently ran Two-way ANOVA with my field experiment data. Before beginning the experiment, I designed to show the interaction between the two dependent (fixed) factors to...

15 November 2021 1,063 6 View

Do multiple comparisons count/pool over separate/independent post-hoc tests in a three-way ANOVA?

I have a 2x2x3 (BBW) design in a 3-way ANOVA and not sure about the family wise type 1 error rate adjustment that I should make for post hoc tests. I run many post-hoc tests - exploring post hoc...

11 November 2021 4,088 3 View

Can you compare different models created with ARTool?

I would like to do model comparisons using AIC with the package ARTool art(), which only does significance testing of the fixed effects. Is this possible? I am running an aligned rank transform...

09 November 2021 9,902 3 View

Do I have too many independent variables? And if not, what method of analysis would you recommend?

The independent variables are: -Two questionnaires with scores (which I can either use as categorical or quantitative, latter would be best) -Three points of measurement (pre, during, and...

08 November 2021 6,686 5 View

Inter-trial coherence (ITC) of EEG data in EEGLAB?

How to compute/plot inter-trial coherence in EEGLAB for all participants (e.g. averaged) data pooled? Is there any tutorial available? Advices are also welcome, currently I'm able to do this only...

06 November 2021 4,348 5 View

What is the formula of Cohen's d in planned contrasts of ANOVA?

I'm unable to find the way to calculate effect sizes of planned contrast according to Cohen's d. Andy Fields only demonstrates how to compute them in Pearson r but that's not what I want. Please...

04 November 2021 7,883 3 View

Anova or t-test? Best method to test how significant the difference of the mean values using 4 different reactants is?

Hello everyone. I am testing which of the 4 reactants I selected give better recovery yields for a given chemical process. So I performed the triplicate of each and have the results, calculated...

02 November 2021 6,767 10 View

What the suitable stastical test for such analysis?

Hello, I am doing my MSc dissertation research on mental health. The aim of my project is to study the association between children's mental health and their parents' mental health, before and...

01 November 2021 8,910 16 View

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