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Table 4 Regression equation, correlation coefficient, and sum of the relative errors for each weighted and unweighted factor

From: Development and validation by statistical treatment of stability indicating RP-HPLC method for quantification of Orlistat in Orlistat-loaded solid dispersion

Model no. Wi WLS/LS regression equation Correlation coefficient (r) ∑% RE
1 Unweighted y = 96732x − 16734 0.9997 65.45
2 1/√x y = 98963x + 32786 0.9994 51.32
3 1/x y = 96289x − 18764 0.9993 44.57
4 1/x2 y = 99726x + 9978 0.9996 34.65
5 1/√y y = 98786x + 16783 0.9993 57.45
6 1/y y = 95638x − 18976 0.9998 56.32
7 1/y2 y = 97863x − 26134 0.9995 39.67