Fit reference values to instrument readings and inspect observed residuals.
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Fit reference values to instrument readings and inspect observed residuals.
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Fit y=a+bx by unweighted least squares using 3–200 paired observations. Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span. Predict only inside the observed reading range.
Calibration observations · Reading to interpolate
Fit reference values to instrument readings and inspect observed residuals.
Fitted reference value: 2 Slope: 2 Intercept: 1
b=Σ((x−x̄)(y−ȳ))/Σ(x−x̄)²; a=ȳ−bx̄; eᵢ=yᵢ−(a+bxᵢ); E%=100 max|eᵢ|/(max y−min y)
Fitted reference value: 2 Slope: 2 Intercept: 1
Use consistent units within each column. Reference values and readings must both vary. This is a descriptive linear fit, not a calibration certificate, uncertainty budget or independent accuracy validation. Outliers and nonlinear response can invalidate its use.
Calculations run on your device. Form inputs are not sent to a server.
Fit y=a+bx by unweighted least squares using 3–200 paired observations.
Enter one item per row; each column describes that item.
Predict only inside the observed reading range.
Enter a numerical value for this quantity.
Minimum: -1000000000 · Maximum: 1000000000
Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span.
Enter a numerical value for this quantity.
Minimum: -1000000000 · Maximum: 1000000000
Predict only inside the observed reading range.
Enter a numerical value for this quantity.
Minimum: -1000000000 · Maximum: 1000000000
Fit y=a+bx by unweighted least squares using 3–200 paired observations. Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span. Predict only inside the observed reading range.
Calculated from your entries using the method below.
Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span.
Calculated from your entries using the method below.
Fit y=a+bx by unweighted least squares using 3–200 paired observations. Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span. Predict only inside the observed reading range.
Calculated from your entries using the method below.
Fit y=a+bx by unweighted least squares using 3–200 paired observations. Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span. Predict only inside the observed reading range.
Calculated from your entries using the method below.
Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span.
Calculated from your entries using the method below.
Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span.
Calculated from your entries using the method below.
Predict only inside the observed reading range.
Calculated from your entries using the method below.
Report each reference minus fitted value, the largest absolute residual and its percentage of the observed reference span.
Calculated from your entries using the method below.
Mistake: Treating a result as valid outside the described scope.
Fix: Use consistent units within each column. Reference values and readings must both vary. This is a descriptive linear fit, not a calibration certificate, uncertainty budget or independent accuracy validation. Outliers and nonlinear response can invalidate its use.
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