Linear model coefficient contrast
Combine coefficients and their covariance into a contrast estimate and standard error.
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Use 2–20 coefficients and matching weights. Supply the full coefficient covariance matrix, including off-diagonal covariances, in the same order.
The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.
Calculation results
- Contrast estimate
- -1
- Standard error
- 0.71414284
- Normal 95% lower
- -2.3996943
- Normal 95% upper
- 0.39969425
How to interpret the output
The estimate is cᵀβ and variance cᵀVc. The displayed 95% interval uses a normal critical value, suitable only when that asymptotic approximation is justified. Finite-sample t intervals, nonlinear contrasts and covariance estimation are not supplied.
Method referenceSource checked 2026-11-06. Read the reproducible calculator validation report.