Data Transformation Technique to Improve the Outlier Detection Power of Grubbs’ Test for Data Expected to Follow Linear Relation

Figure 1

Two data sets, each containing one outlier which cannot be located by Grubbs test. The outlier in data set 1 is the last element of the series and considerably deviates from the expected value. The outlier in data set 2 is the maximum of the series, but it is not the first or last element.