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

Table 6

Data set 4 (): data set is not continuously incrementing or decrementing. Outlier is neither the first nor the last element. With new transformation technique, Grubbs’ test on is capable of identifying the outlier with significance level of 0.01.

						Grubbs’ test on	Grubbs’ test on
1	30	—	—	4.667	25.333	No	No
2	28	—	—	9.333	18.667	No	No
3	40	—	—	14	26	No	No
4	76	—	—	18.667	57.333	Yes	No
5 ()	51	51	4.8	23.333	27.667	No	No
6	54	54	6	28	26	No	No
7	62	62	2	32.667	29.333	No	No
8	66	66	6	37.333	28.667	No	No
9	69	69	4	42	27	No	No
10 ()	76	76	5.2	46.667	29.333	No	No