Post Hoc Tests
Dunnett Test Calculator
Dunnett Test Calculator compare treatments against a control.
Post Hoc Tests
Dunnett Test Calculator
Compare treatments against a control.
Formula
Dunnett test compares each treatment with the named control using pooled MSE. Two-sided family p-values and the simultaneous critical value come from the correlated multivariate t distribution, evaluated with a fixed reproducible simulation.
About the Dunnett Test Calculator
Compare treatments against a control. Post hoc procedures identify which means differ while applying the named family-wise, stepwise, unequal-variance, control-comparison, or decision-theoretic rule.
How the Dunnett Test Calculator Works
Dunnett test compares each treatment with the named control using pooled MSE. Two-sided family p-values and the simultaneous critical value come from the correlated multivariate t distribution, evaluated with a fixed reproducible simulation.
The calculation runs in your browser. Submitted values are validated for the required numeric range, data shape, units, and method-specific restrictions before a result is shown.
Required Inputs
- Groups (required)
- Control group name (required)
- Alpha (required)
Results Reported
The result panel shows the final answer together with the intermediate quantities needed to audit the calculation. Depending on this method, reported values include:
methodcontrol_groupgroup_summariesmsedf_errorcorrelation_matrixsimulation_seedsimulation_drawsmonte_carlo_standard_error_at_0_05critical_valuealphacomparisonscomparison_count
Dunnett Test Calculator Example
Use the example data button to load a known sample, then calculate and review the statistic, p-value or estimate, and interpretation.
| Input | Example value |
|---|---|
| Groups | Control: 8,9,6,7
A: 10,12,9,11
B: 14,13,15,16 |
| Control group name | Control |
| Alpha | 0.05 |
How to Use the Calculator
- Confirm that the calculator title and method match the quantity, test, conversion, or planning question you need to solve.
- Enter values with compatible units and the requested sample, group, matrix, count, date, or option format.
- Select Example Data to inspect a valid input layout, or enter your own values and select Calculate.
- Review the result table, formula, worked substitutions, warnings, and interpretation rather than using only the headline number.
- Use Copy Result or Download CSV when you need a reusable record of the displayed calculation.
Understanding the Result
Do not treat different multiple-comparison procedures as synonyms; each controls error or loss differently and may require a significant omnibus test.
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.
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 Dunnett Test Calculator calculate?
Compare treatments against a control.
Which formula does the Dunnett Test Calculator use?
Dunnett test compares each treatment with the named control using pooled MSE. Two-sided family p-values and the simultaneous critical value come from the correlated multivariate t distribution, evaluated with a fixed reproducible simulation.
What input does this calculator need?
The calculator form shows the required values and validates them before calculating.
Are the formulas visible?
Yes. Each calculator displays its method, assumptions, and interpretation unless disabled by the site administrator.