To specify limits
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1    In control chart dialog box, click Gen Var Options. Click the Limits tab.

2    Do any of the following:

·    Under Display additional confidence limits at, enter one or more values or enter a column of values in These percents. Enter proportion values (between 0 and 1) or percent values (between 1 and 100).

·    Under Place bounds on confidence limits, check Lower confidence limit bound, then type the lower confidence limit (greater than 0).

·    Under Place bounds on confidence limits, check Upper confidence limit bound, then type the upper confidence limit (greater than 0).

3    Click OK.