Page 23 - Statistics presented by Dr. Sara Ismail Aborass
P. 23
9/8/2023
Linear Regression
Fitting a straight line to observations
Small residual errors Large residual error
Error = (Actual value) – (Predicted value)
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Example
Upon analyzing prepared standard solutions (known
composition and concentrations), the instrumental
responses (A, F or RI) are recorded and the relation
between the conc (x) and the response (y) is investigated
conc 60 70 80 90 100 110 120 130 140
(mg/mL)
response 100 150 160 235 250 290 295 330 400
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