STATISTICAL TREATMENT FOR REJECTION OF DEVIANT VALUES - CRITICAL-VALUES OF DIXON Q PARAMETER AND RELATED SUBRANGE RATIOS AT THE 95-PERCENT CONFIDENCE LEVEL

Critical values at the 95% confidence level for the two-tailed Q test, and related tests based upon subrange ratios, for the statistical rejection of outlying data have been interpolated by applying cubic regression analysis to the values originally published by Dixon. Corrections to errors in Dixon's original tables are also included. The resultant values are judged to be accurate to within +/- 0.002 and corroborate the fact that corresponding critical values published in recent statistical treatises for analytical chemists are erroneous. It is recommended that the newly generated 95% critical values be adopted by analytical chemists as the general standard for the rejection of outlier values.