Options - Parameters
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Charts   R, S, Moving Range, CUSUM

Enters historical data for estimating s. For example, if you have a known process parameter or an estimate obtained from past data, you may enter this value or values. If you do not specify a value for s, Minitab estimates it from the data. You can omit or include certain subgroups when estimating parameters using Estimate.

Dialog box items

Standard deviation: Enter the historical standard deviations as constants.