Averaging the closest two out of three observations
Blodgett, R.J.
Journal - Association of Official Analytical Chemists 83(3): 661-664
2000
ISSN/ISBN: 0004-5756 PMID: 10868589 Document Number: 513923
The average of 3 observations is the standard method of estimating the location of their distribution. The average of the closest 2 out of 3 observations, although often used, has more variability than the average of all 3 observations for a standard normal distribution. One statistic uses a threshold to decide when to use the average of all 3 observations rather than the closest 2. With the standard normal, this statistic still has more variability than the average of all 3 observations.