If X bar = 47.2, n = 12, s bar = 2.3, and 25 samples have been collected, then the control limits for an S-Chart are:      0.280(2.3), and 1.720(2.3)    0.354(2.3), and 1.646(2.3)    0.565(2.3), and 1.435(2.3)    0.460(2.3), and 1.540(2.3)

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