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1 2 - 2 . An control chart is developed for recording the mean value of a quality characteristic by use of a sample size

12-2.An control chart is developed for recording the mean value of a quality characteristic by use of a sample size of three. The control chart has control limits (LCL and UCL) of and respectively. If a new sample of three items has weights of and what can we say about the lot (batch) it came from?

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