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Bivariate Analysis
Bivariate control is the method of comparing and controlling two or more
related variables in situations where quality depends on the combine effect of
these variables. This method is most useful when two different variables work
together to affect the acceptability of a process or part thereof; for example,
the X and Y position of a hole, temperature and humidity of a drying oven or
the concentrations of two chemicals in a reaction.
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