All Questions
144 questions
3
votes
1
answer
38
views
What are the advantages and disadvantages of using a one-way between subjects MANOVA versus a split-plot repeated measures ANOVA?
For example, I would like to analyse the difference in heart rate, breathing rate, height, weight, and number of hair between three species (cats, dogs, and rats). This is a nonsensical example of ...
- 331
5
votes
1
answer
49
views
Is Repeated Measure MANOVA appropriate here?
I have data on the yearly number of doctor visits for patients from 2020 to 2022, along with characteristics associated with these visits. During each visit, patients are asked questions about their ...
- 203
1
vote
1
answer
67
views
What analysis do I need for 2 Ivs and 2 DVs?
I think I need a MANOVA, but I may need an ANCOVA and then also do an ANOVA within just the experimental group.
I think it's a 2x2 factorial independent measures ANOVA within the intervention group. I ...
0
votes
1
answer
89
views
In a repeated measures ANOVA, is the pairwise comparison result still valid if sphericity is not assumed?
For the pairwise comparison, the p value is less than 0.001. However, the p value for Mauchly's test of sphericity is also <0.001. I believe that SPSS automatically applies the Greenhouse-Geisser ...
2
votes
1
answer
31
views
Which statistical test to use analyzing multivariate brain scan data (Channels, Frequency Bands, Measures)?
As a Computer Science student inexperienced in statistics, I'm looking for some advice on selecting the appropriate statistical test for my dataset.
My data, derived from brain scans, is structured ...
- 21
3
votes
1
answer
83
views
Quantitative Proteomic Analysis : ANOVA or MANOVA?
So, this may be a really dumb question but I'd rather ask it now than 3 weeks later when I'm neck deep into problems. The title is kind of self-explanatory but I'll expand a bit :
I've been tasked of ...
- 43
0
votes
0
answers
40
views
2-way ANOVA interaction between a factor with itself, does not make sense?
I have done a DOE that I am in the process of analyze with a two-way ANOVA.
The DOE has been generated by the JMP software and I specified that I want calculate the main effects and the 2nd ...
- 1
1
vote
1
answer
68
views
Which type of statistical analysis to run in R with 2 treatment types in my study?
(Originally asked on Stack Overflow, reposting here after a commentor mentioned this is a better place to ask it.)
I have a seed germination study that I am trying to analyze. In this study I had 4 ...
3
votes
0
answers
125
views
How does one create comparable metrics when the original metrics are not comparable?
The problem I have is that I have several groups (say 3 to make discussion concrete) with observations from a true but known distribution $p^*_1, p^*_2, p^*_3$ (or 3 populations). I can compute some ...
- 7,074
1
vote
0
answers
33
views
Which statistical test is more appropriate?
I have collected data for an experimental study from 88 participants. Specifically, all participants received both interventions but in a different order. 44 participants received firstly Treatment A ...
- 11
3
votes
3
answers
301
views
One-way ANOVA for multiple features?
I have 60 continuous features (i.e., lab results) for 35,000 patients, and the patients are divided into three groups. I want to evaluate each feature to find out what the differences are between the ...
- 31
0
votes
1
answer
61
views
Would I use a one-tailed paired-sample t- test on this?
I am doing an assignment that tests whether acceptance and commitment therapy is beneficial for social anxiety disorder.
With an experimental and controlled group.
I just need to know what test I ...
1
vote
1
answer
45
views
Repeated measures factorial ANOVA - independent variables from an equation
I have responses from 30 patients for 4 independent variables. ind_var1 has 2 levels, ind_var2 has 3 levels, ind_var3 has 2 levels and ind_var4 has 4 levels. No groups in the dependent variable. So ...
- 13
0
votes
1
answer
85
views
Should this be an ANOVA or a MANOVA?
I'm fairly new to statistics and am struggling to figure out whether I should be using ANOVA or MANOVA for my research design:
Participants will watch a performance together in one of three different ...
- 19
0
votes
1
answer
203
views
Normal and non-normal distribution of data?
I am quite an amateur in statistics. I have data where I would like to test if I can perform parametric or non-parametric testing depending on if the data is normally distributed or not.
The data has ...
1
vote
1
answer
90
views
Model selection for $4\times 2\times 2$ factorial design in R
I have read so many books, forums, and sites that I have completely confused myself.
Originally, my design was a simple 4x2 factorial with two categorical predictors, but it has gotten more complex ...
- 101
1
vote
0
answers
19
views
Best approach to finding a statistical significance within the data
$\textbf{Description of Dataset:}$
I've got a dataset where 3 mice per cage are fed a certain diet. There are 3 diets and a control diet (4 diets all up), and 3 cages tied to each diet, so 36 ...
- 11
0
votes
0
answers
236
views
Three-way manova or separate anovas?
I have three independent catagorial variables and two dependent continuous scale variables, so I want to compare means across these three independent catagorial variables.
I think here the best choice ...
- 57
0
votes
0
answers
52
views
Finding variable contribution in manova
I have a dataset with one grouping factor and some dependent continuous variables. Given the difference, I want to know which variables contribute the most to the difference, like this variable A is ...
- 1
1
vote
0
answers
134
views
Am I (reviewer) correct or is the researcher correct re: Bonferroni?
I've been asked to review an article for a low-tier journal, such that I am the only reviewer with stats knowledge (such as it is; I used to teach stats and advanced stats, but it's been a few years ...
- 11
2
votes
0
answers
134
views
What is the alternative to the 2-way ANOVA when the data are non-parametric in addition to being non-ordinal
I understand that the scheirer-ray-hare test would be a good option, however, the literature mentions that it is not reliable in my case because it uses data on an ordinal scale. What alternative ...
- 21
1
vote
0
answers
76
views
MANOVA Repeated Measures
I hope somebody can help me with my confusion.
My dependent variables are: emotions, interest, and attitude change, while independent variable is type of message: a) self-appraisal message b) family-...
- 11
1
vote
1
answer
98
views
Why repeated measures output gives different output than MANOVA (SPSS)?
I see that this topic was closed few days ago, because it concerns specific context (data). No actually it does not. This is something that happens with any two variables that u have (at least 2) and ...
- 171
1
vote
0
answers
12
views
What type of analysis to do for Dissertation- EMOTION RECOGNITION
In my study, participants take part in the State Trait Anxiety Inventory (STAI) where they are ranked into high or low trait anxiety groups.
Participants are then shown multiple videos of 7 different ...
- 11
1
vote
0
answers
486
views
How to account for mediators in ANOVA?
So I have two IVs (customization, purchase type), three mediators (self-expressiveness, social connections, evoked comparisons) and one DV (happiness). Purchase type is either experiential or material,...
- 11
0
votes
2
answers
490
views
Should I use a repeated measures MANOVA or several repeated measures ANOVAs?
I'm doing a randomised controlled trial, it has four dependant variables each measured at three time points. The data is normally distributed.
My question is how to analyse this. I'm wondering whether ...
- 101
1
vote
1
answer
56
views
Analyses of Gene expression dataset, what stat test?
I was wondering if there was a way to analyse my RNA seq dataset in a way that I could work out which day the specific gene I have is most significantly expressed?
I have a RNA seq dataset with 6 days ...
- 11
1
vote
0
answers
79
views
Testing differences between groups in time course experiment
I want to analyze my data of glucose tolerance test experiment.
I have two groups- test and control, and we measured the glucose levels at 5 time points (0,15,30,60,120 min).
I want to test for ...
- 21
0
votes
1
answer
48
views
Method of Data analysis [duplicate]
For my research I am comparing actual purchases (in amounts of products bought) in different conditions. I'm examining whether applying a certain promotional intervention improves the amount of ...
- 29
1
vote
1
answer
3k
views
How do I run a two-way repeated measure MANOVA in R?
I am trying to run a repeated measure MANOVA in R, with two within subjects independent variables and three dependent variables.
I converted the df in long format and I am now trying to run the ...
- 143
4
votes
1
answer
61
views
Is this a proper use of mixed modeling?
I admit I'm fairly new at statistical modeling and so I'm not confident in the method I am using.
Using LC-MS/MS, I am monitoring the degree of post-translational modification of specific peptides by ...
- 43
1
vote
0
answers
44
views
ANOVAs with dichotomous and multicategorical IVs: how to compare subcategories? [closed]
I have continuous DVs and my IVs are two categorical variables, one is dichotomous (low/high) and one is multicategorical (1/2/3/4). I'm interested in comparing each group and their interactions. For ...
- 11
0
votes
1
answer
177
views
As to unbalanced design sample data,do we need to check variance homogeneity as precondition of two way anova?
For the balanced design data,I know variance homogeneity among each cell is the requirement of two way anova.
As to unbalanced design data,do we need to check the variance homogeneity of each cell?
If ...
- 294
1
vote
1
answer
670
views
Can we use `two way anova` when factors have interaction?
You should have independence of observations, which means that there
is no relationship between the observations in each group or between
the groups themselves.
Above sentence come from https://...
- 294
0
votes
0
answers
1k
views
Comparing the before and after scores between two groups
In this experiment I'm trying to make, one group of people watches a lecture series and one does not. Before the lecture series, both groups' levels of optimism, knowledge, and anxiety are assessed. ...
- 1
0
votes
0
answers
37
views
Set of Social Values of different Samples: ANOVA?
I have been collecting data for 10 consecutive years. One survey each year, different subjects (samples between 105 and 120), Likert scale 1-5 for each of 30 social values. What is the most ...
- 21
0
votes
1
answer
253
views
Statistical analysis of amino acid profiles, quantitative vs qualitative methods?
I work on a study comparing the amino acid profile of 5 sample groups with 3 replicates in each group. This is how the data looks like except that there are 17 columns (one for each amino acid) in ...
- 165
1
vote
1
answer
442
views
Deciding to use an ANOVA model with interactions or testing significance without interaction
I know this is a widely discussed topic and there are numerous sources and examples. However, most of the statistical jargon goes over my head. I was hoping that someone could simply explain my ...
- 143
0
votes
2
answers
1k
views
Insignificant two-way MANOVA results - what do I do next?
I am very very new to stats. I decided to try and do a MANOVA in SPSS, my between-subjects IV is gender and my within-subjects IV is the two conditions in which all participants took part. My DV is ...
1
vote
2
answers
16k
views
Is there a non-parametric alternative to Two-Way Repeated Measures Anova?
I am currently comparing the EEG funcional connectivity measured at 14 electrodes and 4 frequency bands between highly and lowly hypnotic susceptible individuals. I extracted the coherence and the ...
- 11
1
vote
1
answer
2k
views
Are my PCA groups significantly different?
I am studying the feeding behaviour of deep sea fishes, and have produced a dataset containing percentages for 20 different fatty acids (totalling 100%) for 32 individual fish. I have performed PCA (...
0
votes
0
answers
20
views
What statistical method should I use to quantify a tests ability to separate by category?
Say I have the table of results below. In Test 1 categories a, b, and c produce results which are clearly distinct. In Test 2 the categories produce some separation, though not entirely. Test 3 ...
2
votes
1
answer
415
views
Do I need to correct for p-value when doing repeated ANOVA test?
We are investigating the relationship between smoking status and the hormone level. Smoking status is X(three-level) and the level of the hormones is Y(continuous variable). However, the smoking ...
- 709
1
vote
0
answers
106
views
Does ordinal logistic regression substitute for "multifactorial Friedman test"?
I'm searching for an appropriate statistical test, more or less a multifactorial version of Friedman test. But I'm also wondering if Wilcoxons rank sum test can do the job.
Experimental design:
10 ...
- 11
1
vote
1
answer
2k
views
How to perform MANOVA with categorical independent variables
I have a dataset where the independent variable is sieve size (categorically either 25, 63, 100 or 150), and the dependent variables are length and width.
...
- 111
0
votes
1
answer
178
views
Why analysis of variance should I use for my clinical trial proposal?
I have 2 independent variabiles(2 treatment groups) and 2 outcomes, measured at 3 time points. Is manova the analysis I should use?
- 15
0
votes
1
answer
274
views
Do ANOVA & MANOVA require balanced levels?
I have one independent variable with two levels, or categories, and four dependent variables.
When doing a MANOVA or ANOVA test, how important is it for the number of observations in each category to ...
- 355
0
votes
0
answers
31
views
What type of test do I use in G Power?
I've got 1 IV with 2 levels (within-subjects) and 4 VD's (with 7 levels).
What type of test do I use in this case ?
Thank you
- 1
1
vote
1
answer
1k
views
Why does One Way ANOVA not have an SSE Term?
For a Two Way ANOVA with two factors A and B, the Sum of Square equation is:-
SSTO = SSA + SSB + SSAB + SSE
Where,
SSTO = Total Sum of Squares
SSA = Sum of Squares due to Factor A
SSB = Sum of ...
- 127
0
votes
1
answer
349
views
Mixed desgin ANOVA or LMM?
I am hitting a wall and would appreciate some help.
Here is my data (raw data, before computing the means):
...
- 15