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Technometrics | Vol.1, Issue.3 | | Pages 239-250

Control Chart Tests Based on Geometric Moving Averages

S. W. Roberts

Abstract

A geometrical moving average gives the most recent observation the greatest weight, and all previous observations weights decreasing in geometric progression from the most recent back to the first. A graphical procedure for generating geometric moving averages is described in which the most recent observation is assigned a weight r. The properties of control chart tests based on geometric moving averages are compared to tests based on ordinary moving averages.

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Control Chart Tests Based on Geometric Moving Averages

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Keywords

graphical procedure geometric moving averages geometrical moving average control chart tests

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S. W. Roberts,.Control Chart Tests Based on Geometric Moving Averages. 1 (3),239-250.

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