Abstract
Occasionally an ergonomist or designer is asked to develop an anthropometric model that will accommodate a desired proportion of an anticipated user population, but with only very limited anthropometric data, such as a summary table of percentiles, available. Despite the known problems of adding or subtracting percentiles, that may be the only option available to him or her. This paper introduces a technique that reduces the error associated with adding percentiles, although it does not eliminate it. Two examples are given.
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