wilcoxon signed-rank test

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

Firstly...I'm an absolute stats novice. I am assessing the urinary toxicity of a procedure by comparing baseline and 6 week International Prostate Symptom Scores (IPSS) for 10 patients. I am applying the wilcoxon signed rank test - however through all my "googling" there appears to be 2...

Hi, I have been doing the following experiment: I have recorded the startle amplitudes triggered by two different sounds - this is for one nice little rat called Roger. The sounds (12x S1 and 12x S2) were randommly distributed like this: S1 - S1 - S1 - S2 - S2 - S1 - S2 - S2 - S2 - S1 - S2 -...

Hello, I would like to run Wilcoxon Signed Rank Test in SPSS 18 for the following data: There are 50 runners in the sample. I tested their pulse BEFORE the run. Some of the drank an energy drink from type 'A'. The rest drank an energy drink from type 'B'. I tested their pulse AFTER the...

Hello guys, I'm trying test if the results of a measurement variable (obtained with observation) is significantly greater than a other (obtained with random process). For the observed, I have an algorithm that returns a number. For the random I use the Bernoulli process, that returns another...