One-Sample t-Test
One-Sample t-Test is one of the statistical analyses applied automatically in MerQur. This page illustrates — on a Architecture, Planning & Design 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?
The One-Sample t-Test automatically performs 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 + 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 Architecture, Planning & Design 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 One-Sample t-Test.
Panel assignments (form fields in the program):
- Value Column:
yesil_alan_orani - Tested μ:
0.4
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 — Architecture, Planning & Design
ℹ Note: The scenario, MerQur output and interpretation below were produced by actually running the real example dataset in MerQur. Numeric results on your own data will differ; the goal is to show how the analysis is set up and interpreted end-to-end.
🎬 Example File
This analysis is demonstrated on the following example dataset for Architecture, Planning & Design:
Peyzaj_Mimarligi/03_one_sample_t_green_area_ratio.xlsx
🎬 Scenario
We investigate whether parks’ mean green-area ratio differs from a 30% planning reference threshold. With one group and a fixed reference, the one-sample t-test is appropriate.
⚙️ Variable Selection
- Test variable: green_area_ratio
- Test value (mu): 0.30
- >> ADVANCED PARAMETERS (optional in the form — what they do):
- Hypothesis direction (two-sided / right / left): one-sided is more powerful when the direction is known beforehand.
- Hedges g: small-sample bias-corrected Cohen’s d.
- Effect-size CI: confidence interval around d.
- Shapiro-Wilk / K-S: normality assumption checks.
- Descriptives: mean/SD/SE/median/min/max/skewness/kurtosis.
- Bootstrap CI: distribution-free CI for the mean by resampling.
Data Preview (First 5 Rows)
| park_id | park_type | green_area_ratio | area_m2 | age_year |
|---|---|---|---|---|
| 1 | neighborhood park | 0.429 | 5384 | 8 |
| 2 | neighborhood park | 0.488 | 3983 | 15 |
| 3 | neighborhood park | 0.522 | 1910 | 9 |
| 4 | neighborhood park | 0.511 | 7973 | 42 |
| 5 | neighborhood park | 0.449 | 5010 | 23 |
n = 100 · Columns: park_id, park_type, green_area_ratio, area_m2, age_year
📈 MerQur Output
💬 Interpretation
We compared parks’ mean green-area ratio against a 30% planning reference threshold. The result is very strong: mean 55.7%, far above the threshold — t(99) = 28.18, p < .001, with an enormous effect size d = 2.82. So these parks exceed the reference target in green-area ratio by more than chance can explain — a green-rich park stock. The one-sample t-test is the right way to compare a landscape indicator against a known standard/norm (green-area standard, per-capita green target); it is widely used in urban green-space planning to assess compliance with targets. >> ADVANCED PARAMETERS (optional in the form — what they do): – Hypothesis direction (two-sided / right / left): one-sided is more powerful when the direction is known beforehand. – Hedges g: small-sample bias-corrected Cohen’s d. – Effect-size CI: confidence interval around d. – Shapiro-Wilk / K-S: normality assumption checks. – Descriptives: mean/SD/SE/median/min/max/skewness/kurtosis. – Bootstrap CI: distribution-free CI for the mean by resampling.
⚠ 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 Architecture, Planning & Design file.
▶ One-Sample t-Test — video walkthrough
This section is part of the Veriye İlk Bakış ve Parametrik Testler video (14 analyses in one video). The link below jumps straight to 4:57, where this analysis begins. Narration is in Turkish.
🎓 Education Sciences · 🧪 Natural Sciences & Mathematics · ⚙ Engineering · 🏥 Health Sciences · 📊 Social, Humanities & Admin Sciences · 🏃 Sport Sciences · 🌾 Agriculture, Forestry & Aquatic
📚 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.