Tagged Questions
2
votes
0answers
39 views
Two uneven groups (101 vs 21) measured twice; what repeated measures ANOVA equivalent can help?
I have a question that I have difficulties in answering:
I have two groups of patients tested twice at the same continuous variable.
Group A=104 & GroupB=21.
So two groups, one continuous ...
1
vote
0answers
49 views
Post-hoc analysis when variable effect is non-significant
In a dataset with 3 related measurements for each case, I ran a Friedman test, and found no significant effect.
Is it appropriate to now run (and report) pairwise tests, as I had planned initially?
...
0
votes
0answers
147 views
repeated measurements study using JMP - how to make a difference plot when data is unbalanced
My study is a repeated measurement design where I'm going to show reproducibility of pulse wave velocity measurements on minipigs.
I have read a lot of articles about reproducibility, both veterinary ...
1
vote
1answer
159 views
The test procedure of significant differences in count data over time
The data below are from a health testing centre over 8 years so there are different people being tested there each year. All I really want to show is that the amount of females being tested is ...
2
votes
0answers
138 views
Longitudinal design - repeated measures, non-parametric, non-balanced design
I am currently trying to find the best way to analyse my data.
Participants were tested longitudinally on up to five occasions. On each day participants were assessed for the presence or absence of a ...
4
votes
1answer
252 views
Friedman's test for binary data - possible or not?
If my dependent variable is a technique scored as 1 for correct step and zero for incorrect can I use Friedmans test to compare technique scores at 3 time points?
3
votes
1answer
127 views
How can I test for within-subject “consistency” across repeated measures?
I have a dataset with a clear question I want to answer, but I'm unsure of the best statistical approach to answer my question. Here's an example that matches the structure of my data:
Let's say we ...
2
votes
0answers
273 views
Non-parametric repeated measures ANOVA [duplicate]
Is there any method to conduct a non-parametric repeated measures ANOVA in a replicated design? I'm using a non-parametric approach because the response variable does not pass the parametric ...
1
vote
1answer
155 views
Choosing the right test
I am having trouble choosing the right test to analyze my data. I have recorded six behaviors every ten minutes and pooled them into one data set.
I would like to compare the time spent in one ...
1
vote
0answers
504 views
Non-parametric test for repeated measures and post-hoc single comparisons in R?
Some attribute x of 17 individuals was recorded repeatedly on 6 time points using a Likert scale with 7 distractors. Which statistical test(s) can I apply to check whether the changes along the 6 time ...
5
votes
2answers
956 views
What descriptive statistics should be reported in tables and graphs when using Friedman's nonparametric test?
I'm using Friedman's nonparametric tests for repeated measures for my thesis (I tried transformations on all variables first but data was still highly skewed) and had 2 questions:
What are the best ...
5
votes
3answers
5k views
What is a minimum sample size for a paired t-test and what is a non-parametric equivalent if data is non-normal?
I have 4 sample pairs, let's say (x1, y1),...,(x4, y4).
What is the minimum sample size for a paired t-test?
Which assumption should I check for paired t-test?
If my data is non-normal, what is an ...
2
votes
1answer
198 views
How to model change over four time points on an ordinal variable where some participants have missing data at some time points?
Context
I am accumulating a data set that is starting to look like this:
I have about fifty individual animals (n=50) that I am studying over, say, a year
Every three months or so, I would measure ...
4
votes
1answer
2k views
Friedman's test and post-hoc analysis
I am carrying out a statistical analysis for my research. I am using a Friedman's test with post hoc analysis. At present I am using the function ...
