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Table 3 Regression parameters for unweighted and weighted regression with different weighting factors

From: An approach to select linear regression model in bioanalytical method validation

Sr. No. Weighting factor a b r 2 % RE F(exp)
1 1 − 0.00083 0.00048 0.998 294.95 272.95
2 1/x + 0.00415 0.00049 0.999 98.70 0.26
3 1/x2 + 0.00872 0.00046 0.998 101.87 0.00026
4 1/√x − 0.00074 0.00048 0.997 169.51 8.52
  1. a is the intercept and b is the slope of calibration curve