Does the data set of 155.8, 158.4, 194.9, 164.8, 154.5, 184.3, 114.8 and 157.8 ppm contain outlier(s)? (Given that Qcrit.90 % confidence interval (n = 8) 3D 0.468) O All data should be retained O It is difficult to judge O Both 114.8 and 194.9 ppm are outliers O 114.8 ppm is the outlier O 194.9 ppm is the outlier
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