Kruskal-Wallis Test
Kruskal-Wallis Test is one of the statistical analyses applied automatically in MerQur. This page illustrates — on a Agriculture, Forestry & Aquatic sample dataset — how the analysis is run, what the MerQur output looks like, and how the result is reported in APA 7 format.
🎯 What is it for?
Kruskal-Wallis Test automatically applies all required assumption checks (normality, homogeneity of variance, etc.) for the relevant data type in the background and presents the results with a clear table and chart. Automatic interpretation in the APA 7 standard, effect sizes such as Cohen’s d/η²/R², and 95% confidence intervals are reported.
📌 When is it used?
- Statistical analysis of measurements in the Agriculture, Forestry & Aquatic domain
- To produce APA 7-compatible result tables for academic publications
- Hypothesis testing and decision-making processes
- Undergraduate / master’s / PhD theses after the appropriate method has been selected
📐 Assumptions
- Appropriate scale — Variables must be at the measurement level required by the analysis (nominal/ordinal/interval/ratio)
- Independent observations — Observations must come from individuals independent of one another
- Sufficient sample size — The minimum n requirement for the analysis must be met
- Outlier check — Outliers must be detected and evaluated
If assumptions are violated, MerQur automatically suggests a non-parametric or robust alternative.
🛠 How to do it in MerQur
Load the data. Select the sample file from File → Open. MerQur auto-detects column types.
Select the analysis. From the left side select Kruskal-Wallis Test.
Panel assignments (form fields in the program):
- Group Column:
toprak_tipi - Value Column:
yillik_gelisim_cm
Optional settings. Effect size ✓ · 95% confidence interval ✓ · Assumption checks (automatic).
▶ Run — click the button. Results are produced automatically as a table + chart.
📄 Export to Word. APA 7-formatted report with italic statistical symbols.
📊 Sample Dataset — Agriculture, Forestry & Aquatic
ℹ Note: The MerQur output and interpretation tables on this page are illustrative, intended to help readers understand the analysis. Numeric results from your own data may differ; this page does not need to match the YouTube video walkthrough exactly.
🎬 File Used in the Video
The YouTube video for this page was recorded for the Agriculture, Forestry & Aquatic domain using the sample file below:
MerQur_Hoca_Tanitim/Ziraat_Orman_Su/16_kruskal_wallis_toprak_gelisim.xlsx
Data Preview (First 5 Rows)
| parsel_id | toprak | verim_ton_ha |
|---|---|---|
| 1 | Kil | 5.50 |
| 2 | Kil | 5.30 |
| 3 | Kil | 1.46 |
| 4 | Kil | 3.04 |
| 5 | Kil | 3.20 |
n = 45 · Columns: parsel_id, toprak, verim_ton_ha
MerQur Output (Illustrative)
MerQur Narrative Interpretation
The Kruskal-Wallis Test showed that the effect of the toprak levels on verim_ton_ha is significant (p < .001, η²p = .31, moderate-to-large effect). Tukey HSD post-hoc comparisons determine which groups differ significantly.
APA 7 Interpretation (Academic Format · Illustrative)
toprak variable has a significant effect on verim_ton_ha, F(2, 42) = 24.82, p < .001, η²p = .31. According to Cohen’s (1988) criteria, the effect size is at a moderate-to-large level. Tukey HSD post-hoc comparisons revealed the significant differences between groups.⚠ Common Mistakes
- Misidentifying the data type (e.g., loading a categorical variable as numeric)
- Skipping assumption checks and going straight to the p-value
- Failing to report effect size — APA 7 requires both p and effect size
- Failing to apply a Type I error correction (Bonferroni/Tukey) in multiple comparisons
- Not switching to a non-parametric alternative when n is insufficient
📹 Video Walkthrough
Watch the video below for an end-to-end walkthrough of this analysis on a Agriculture, Forestry & Aquatic file.
🎓 Education Sciences · 🧪 Natural Sciences & Mathematics · 🏛 Architecture, Planning & Design · ⚙ Engineering · 🏥 Health Sciences · 📊 Social, Humanities & Admin Sciences · 🏃 Sport Sciences
📚 If You Used This Analysis, Cite MerQur
If you performed this analysis using MerQur in a scientific study, please use the citation below as part of your academic citation obligations (APA 7):
Örücü, Ö. K. (2026). MerQur: Integrated Academic Data Analysis & Reporting Platform [Computer software] (Version 1.0.0). https://doi.org/10.53463/merqur.2026001
For BibTeX, RIS, EndNote and the English citation form: all citation formats →
- American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.).
- Field, A. (2018). Discovering statistics using IBM SPSS Statistics (5th ed.). Sage.
- Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Lawrence Erlbaum.