The bimean: A measure of central tendency that accommodates outliers |
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Authors: | Peter R. Killeen |
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Affiliation: | 1. Department of Psychology, Arizona State University, 85287, Tempe, AZ
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Abstract: | Observations that depart considerably from the center of a distribution demand special consideration. They may be retained, trimmed, or weighted less than other data. This article provides a BASIC program that implements Mosteller and Tukey’s (1977) technique for weighting observations less as they depart from the middle of a distribution. Influence curves for this “bisquare-weighted mean,” or “bimean,” are displayed and compared with more traditional measures of central tendency. |
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