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

Figure 6

Outlier detection of volumetric percentage of CH4 in biogas with new transformation technique for significance level of 0.05 for different window sizes without overlap. Plots (a), (b), (c), and (d) correspond to window sizes 4, 5, 6, and 10, respectively.

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