# wilcoxon signed-rank test

1. ### Wilcoxon signed-rank test - Effect size with small sample size

Good afternoon. I have two dependent variables and I want to demonstrate that one is higher than the other. My number of observations (N) is equal to 9 (it is a small sample). Since my distribution is not normal, I am using the Wilcoxon signed-rank test. I would also like to calculate the...
2. ### Wilcoxon Signed Rank Test for Small Sample Size

Hello! I am a bit stumped with the research I am conducting and wanted to ask for some advice/insight. My study involved having 4 individuals complete the same 3 measures at pre- and post-test. So each individual completed each measure before receiving an intervention, and then completed the...
3. ### Do I have to conduct a normality test for only one paired sample?

I have to conduct an action research and I only have one participant. I intend to give the participant a pre-test (before intervention) and a post-test (after intervention). Since this is an action research, I intend to do at least two cycles. I want to know whether the intervention would make...
4. ### Two Group, Two Measures, and Ordinal Data- Wilcox it?

I'm proposing the following methodology (a cross-over design variation?), consisting of a sample of respondents equally and randomly assigned to one of two groups (i.e., video materials or written materials). The participants will then complete a ranking survey task and ranking selection-task...
5. ### Statistical Method Help!

Paired data statistical method help? I have a set of data that I would like to test a hypothesis against (H0: Mean Difference = 0 vs. H1: Mean Difference <> 0). I have a time 1 and time 2 data (paired data) after some form of treatment. n=65 and scores range from 0-10. My data is non-normal and...
6. ### Which analysis for a survey question asking how frequently a group do an activity ?

I surveyed a group of photographers and asked them how frequently they used a particular type of lens for a specific type of photograph. I now want to find out which lens or lenses are the most commonly used for each type of photograph. There were four lens types and five types of photographs...
7. ### Wilcoxon Signed rank test, Students's T-test, or a mixture of both?

Hello! For my dissertation I am looking at the temporal order of physiological and behavioural events before a voluntary action. I have 12 different repeated measures variables including: Time of intention (W), Readiness potential 1 (as measured by task A) Readiness potential 2 (task A), RPmax...
8. ### Non-parametric statistical test with two nominal variables

Hello everyone,:wave: I have the following data: feces density of a carnivore species subdivided according to sex. I am looking for appropriate test suggestions. I have calculated the density according to main habitat types, topography, and road types. To determine if results are...
9. ### Wilcoxon Signed Rank test - the best test to use?

Hi - could anyone help me with this please? I am trying to choose the best statistical test for a problem I have - I am looking at rainfall anomalies for E. Africa and evaluating how ocean modes influence them (ENSO and Indian Ocean Dipole). I have seasonal averages for every Spring (so one...
10. ### Is Wilcoxon Sign Rank the appropriate test?

Hi - could anyone help me with this please? I am trying to choose the best statistical test for a problem I have - I am looking at rainfall anomalies for E. Africa and evaluating how ocean modes influence them (ENSO and Indian Ocean Dipole). I have seasonal averages for every Spring (so one...
11. ### Question about Rank Sum Test

The file CO2.csv contains information about the CO2 uptake of trees in two locations. The first few lines of the file are > co2[1:5,] Type uptake 1 Quebec 16.0 2 Quebec 30.4 3 Quebec 34.8 4 Quebec 37.2 5 Quebec 35.3 > Perform a nonparametric test to determine if the uptake is the...
12. ### wilcoxon signed-rank test to compare 2 pseudo-randomized distributions?

Hello I need help to find the good statistic to use to compare two distributions of data coming from pseudo randomized trials. I have recorded some activity of different entities while a subject was performing a task with 4 conditions: A (start on the right, stay on the right), B (start on...