Chi-Square Tests
Cochran–mantel–haenszel Test Statistical Calculator
Cochran–Mantel–Haenszel Test Calculator test a common association between two binary variables while controlling for strata. Use Cochran–Mantel–Haenszel Test Calculator to validate strata as a,b,c,d; one line per stratum, alpha and report mantel–haenszel odds ratio, cmh chi square, p value, decision with method-specific calculations, diagnostics, and interpretation. Use the tabbed test workspace below for data, variables, analysis, visualizations, results, interpretation and reporting.
Quick method summary
The cochran–mantel–haenszel test statistical calculator test a common association between two binary variables while controlling for strata.
Chi-Square Tests
Cochran–Mantel–Haenszel Test Calculator
Test a common association between two binary variables while controlling for strata. Use Cochran–Mantel–Haenszel Test Calculator to validate strata as a,b,c,d; one line per stratum, alpha and report mantel–haenszel odds ratio, cmh chi square, p value, decision with method-specific calculations, diagnostics, and interpretation.
Calculated result
When to use
Test a common association between two binary variables while controlling for strata.
Formula or algorithm
The CMH statistic compares summed observed and expected a-cell counts using their conditional variances across strata.
Assumptions and limits
Use the variable scales and sampling design required by this named statistical method. Review missing values, independence or pairing, outliers, and distribution or model assumptions before interpretation. Confirm that the selected dependent, independent, grouping, time, item, rater, or matrix variables match the research design.
Formula review
Formula, input validation, output contract, and independent control cases reviewed 2026-08-02; study-design assumptions remain visible to the user.
Cochran–Mantel–Haenszel Test Calculator method, assumptions and reporting guideComplete selected-test explanation, assumptions, formula and reporting details
Data Import and Variable Requirements
Upload XLSX, CSV, TSV, TXT, JSON, or pasted data where applicable; inspect cleaning, select the required variable roles, and review mapped inputs before calculation. For Cochran–Mantel–Haenszel Test Calculator, map Strata as a,b,c,d; one line per stratum, Alpha from the cleaned browser-local table; every mapped variable remains editable before calculation, and the active dataset remains available while you work with this selected test and when you return to the Test Finder.
Uploaded files are processed locally in the browser. The cleaning report appears before variable selection, and the selected cleaned columns are mapped to this exact calculator rather than a generic fallback.
Cochran–Mantel–Haenszel Test Calculator Workspace Features
- Dedicated Cochran–Mantel–Haenszel Test Calculator variable mapping, calculation contract, result explanation, and diagnostics
About the Cochran–Mantel–Haenszel Test Calculator
Test a common association between two binary variables while controlling for strata. Use Cochran–Mantel–Haenszel Test Calculator to validate strata as a,b,c,d; one line per stratum, alpha and report mantel–haenszel odds ratio, cmh chi square, p value, decision with method-specific calculations, diagnostics, and interpretation. Chi-square and exact-table calculators analyze categorical counts, expected frequencies, or standardized contingency-table association.
When to Use the Cochran–Mantel–Haenszel Test Calculator
Test a common association between two binary variables while controlling for strata.
How the Cochran–Mantel–Haenszel Test Calculator Works
The CMH statistic compares summed observed and expected a-cell counts using their conditional variances across strata.
The calculation runs in the browser. Submitted values are validated for required numeric ranges, data shape, units and method-specific restrictions before results are shown.
Assumptions and Checks
- Use the variable scales and sampling design required by this named statistical method.
- Review missing values, independence or pairing, outliers, and distribution or model assumptions before interpretation.
- Confirm that the selected dependent, independent, grouping, time, item, rater, or matrix variables match the research design.
Required Inputs
- Strata as a,b,c,d; one line per stratum (required)
- Alpha (required)
Results Reported
The result workspace shows the final answer and intermediate quantities needed to audit the calculation. Depending on the method, reported values include:
- Mantel–Haenszel Odds Ratio
common_odds_ratio - CMH Chi Square
chi_square - P Value
p_value - Decision
decision
Cochran–Mantel–Haenszel Test Calculator Worked Example
Load the verified example or upload cleaned data, assign variable roles, calculate, and review the method-specific result and chart.
| Input | Example value |
|---|---|
| Strata as a,b,c,d; one line per stratum | 12,8,5,15
9,11,4,16
14,6,7,13 |
| Alpha | 0.05 |
How to Use This Workspace
- Confirm that the method matches the quantity, hypothesis, model or planning question you need to solve.
- Enter values with compatible units and the requested sample, group, matrix, count, date or option format.
- Use Example Data to inspect a valid input layout, or enter your own values and run the calculation.
- Review the result table, formula, substitutions, warnings and interpretation rather than relying only on the headline number.
- Copy, download or print the result when you need a reusable analysis record.
Understanding and Reporting the Result
Interpret the estimate, uncertainty, test statistic, p-value, effect size, and diagnostics for the selected variables and design. In the Cochran–Mantel–Haenszel Test Calculator result workspace, interpret Mantel–Haenszel Odds Ratio, CMH Chi Square, P Value, Decision together with the method assumptions, warning messages, confidence information, effect magnitude, and diagnostic plots shown for the selected variables.
Enter counts rather than percentages and review expected-frequency warnings; sparse 2x2 tables may require Fisher exact inference.
Keep the entered values, units, selected options and any warning shown beside the result. For a hypothesis test, report the statistic, degrees of freedom where applicable, p-value, alpha level, effect size and decision. For an estimate or conversion, report the formula convention and final unit.
How to Report the Result
Report the method, selected variables, sample information, estimate or statistic, uncertainty, p-value when applicable, and practical conclusion. A reproducible Cochran–Mantel–Haenszel Test Calculator report should identify the mapped variables, valid observations, exclusions or missing-data handling, selected options, principal outputs, uncertainty, diagnostics, and the practical conclusion supported by the analysis.
Accuracy and Limitations
The calculator keeps full browser precision during calculation and rounds only for display. Accuracy still depends on correct inputs and on whether the displayed model represents the real problem. Educational calculators cannot replace required professional review, current official rules, field measurements, laboratory methods or specialist statistical software where those are necessary.
Frequently Asked Questions
What does the Cochran–Mantel–Haenszel Test Calculator calculate?
Test a common association between two binary variables while controlling for strata. Use Cochran–Mantel–Haenszel Test Calculator to validate strata as a,b,c,d; one line per stratum, alpha and report mantel–haenszel odds ratio, cmh chi square, p value, decision with method-specific calculations, diagnostics, and interpretation.
Which formula does the Cochran–Mantel–Haenszel Test Calculator use?
The CMH statistic compares summed observed and expected a-cell counts using their conditional variances across strata.
What does the cochran–mantel–haenszel test statistical calculator calculate?
Test a common association between two binary variables while controlling for strata.
Can the cochran–mantel–haenszel test statistical calculator upload Excel or CSV data?
Yes. The web application cleans supported files locally in the browser and maps compatible variables to the calculator.
Does the cochran–mantel–haenszel test statistical calculator show a chart?
Yes. The result panel renders a method-specific chart or diagnostic visual from the entered or uploaded data.
How should I report the cochran–mantel–haenszel test statistical calculator result?
Report the method, variables, sample information, estimate or statistic, uncertainty, p-value where applicable, assumptions, and conclusion.