1
vote
1answer
47 views

Confidence interval does not include 0, but Wilcoxon test is sgnificant

I've created an error plot with CI 95% to visualize the difference (post test - pre test) between achieved scores. n = 64 Judging from the confidence intervals one could conclude that there's is ...
0
votes
1answer
455 views

Fisher's Exact Test value in SPSS

I have two ordinal variables, and I'm using the Fisher's Exact Test in lieu of the chi-square test when the expected values for the latter test are lower than 5. My contingency tables are $3\times2$. ...
0
votes
0answers
125 views

Can complex Kruskal-Wallis results be reported in tables for APA-style publication?

Advice? I ran a Kruskal-Wallis H test in SPSS and have a lot of variables to report for a paper for publication in APA format with limited word count. Can I show all the paired comparisons in a ...
1
vote
0answers
51 views

comparing two groups on ordinal data with covariates

Hi I am using SPSS to compare two groups on ordingal data (frequency of substance use): never, 1-5/week, 6-10 week etc. The substance use data is highly skewed and non-transformable so ANOVA is out. I ...
0
votes
0answers
113 views

Correlation with non-normal distribution

I want to find the correlation between a continous variable with a non normal distribution, positively skewed, and a categorical variable with 4 categories. The only test I can find that fits these ...
5
votes
2answers
181 views

Correlation between vegetation and erosion

I am wanting to find the correlation between two variables: a categorical vegetation variable (with categories 1-4) and a continuous variable of erosion (with values anywhere between 0.2 and 9). I ...
0
votes
0answers
104 views

What is the most appropriate implemented statistical method for marketing mix model with Spss Modeler

I want to use marketing mix models with SPSS Modeler so as to estimate the impact of each marketing activity (tv, clicks) seasonality and promo activities etc. I have 1 year's data. What are the ...
4
votes
1answer
497 views

What to do when a Mann-Whitney U assumption is violated?

I'm using a M-W U test to analyse some Likert scale results I have, as my data is ordinal. One of the assumptions that keeps on appearing on references is the following: "both distributions must be ...
0
votes
0answers
105 views

Nonparametric statistical test for analyzing 2*3 between-subject design's main & interaction effect

I am now having trouble analyzing my data since I got stuck on selecting the proper statistical test to use. My data is a 2$\times$3 between-subject design data. The two IVs are one norminal(with ...
1
vote
1answer
443 views

Is ETA a good measure for computing the efect size between an ordinal and a nominal variable?

I have a nominal and an ordinal variable and I would like to look measure the association that is between the two. For now, I have done Chi-square test and non-parametric Kruskall-Wallis Test and I ...
1
vote
2answers
485 views

Test to determine significance for non normal data with different variance and unequal n?

How can I find out if the differences in length and width of cut marks left in fabric are significantly different between groups (knife types)? Additional Information Groups: ...
0
votes
0answers
363 views

Friedman's Anova on qualitative data in SPSS

I have some qualitative data and having trouble preparing the data before I perform the analysis in SPSS. My understanding of Friedman's anova is that the data must be ranked from lowest to highest. ...
1
vote
0answers
294 views

How do I test to see if the demographic proportions between two unequally sized groups are statistically different?

Sample of 102 broken into two groups based on a factor of interest Group 1, n=77 Group 2, n=25 Trying to figure out how to test if the demographic (age, race/ethnicity, gender, education level, ...
1
vote
1answer
369 views

Non-parametric multilevel analysis in SPSS

I have a trial with 8 groups. Each group experienced one of two treatments - four groups got treatment A & 4 got B. Within each group, the dependent variable was measured 4 times. Unfortunately, ...
1
vote
0answers
2k views

How do you report Kruskal Wallis one way analysis of variance and post hoc results following APA 6th standards?

How do you report Kruskal Wallis One Way Anova and post hoc results according to APA (American Psychological Association) 6th ed. standards? I have tried to find a template for reporting the results ...
2
votes
0answers
260 views

How to test for differences from baseline where dependent variable is non-normally distributed using SPSS?

I have some physiological measurements which consist of 4 events measured in a "during task" condition and preceded and followed by a rest period. I want to test that the data points immediately ...
1
vote
2answers
1k views

How do I get non-parametric test values (not just p) in PASW 18?

from what I can tell, PASW v.18 (the new version of SPSS) only gives you the p value of nonparametric tests. I am calculating Kruskal Wallis and Mann Whitney tests, and need to report the test ...