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Which of these can be used as a forecast of where the process mean will be at the next time period?

Which of these can be used as a forecast of where the process mean will be at the next time period? Correct Answer EWMA chart

The EWMA charts have both monitoring, and forecasting abilities. They can actually predict the position of process mean at the next time period. The statistic, zi is actually a forecast of the value of the process mean at time i+1.

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