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Process Analysis Using the Runs Test

Summary: Raouf and Sathe [1] give a computer program for evaluating whether or not a sequence of observations can be considered random, using the number of runs and the sample median as a reference point. In this paper, the basic runs test is reviewed and then it is shown to be useful in a wide variety of situations. The number of runs can be used- to detect patterns in production,- to examine regression models for underfitting or misfitting,- to look for serial correlation in time series or trend analysis,- to evaluate discriminant analysis functions with qualitative or other non-normal preditor variables, and for many other purposes.

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  • Topics: Process Management
  • Keywords: Statistical tests,Trends,Discriminant analysis,Goodness of fit,Process analysis
  • Author: Mullet, Gary M.
  • Journal: Journal of Quality Technology