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

Table 1

Results of Grubbs’ test (two-sided) for data set 1 and data set 2 for significance levels () of 0.05 (critical value of ) and ( = 2.48).

	Data set 1		Outlier?		Data set 2		Outlier?
			1	30			1.22	No	No	30	1.34	No	No
2	35	0.98	No	No	190	2.24	No	No
3	40	0.73	No	No	50	0.89	No	No
4	45	0.49	No	No	60	0.67	No	No
5	50	0.24	No	No	70	0.45	No	No
6	55	0	No	No	80	0.22	No	No
7	60	0.24	No	No	90	0	No	No
8	65	0.49	No	No	100	0.22	No	No
9	70	0.73	No	No	110	0.45	No	No
10	100	2.20	No	No	120	0.67	No	No