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X bar and S chart are more accurate in predicting out-of-control situations than the x bar and R charts, in the case of high sample size.

X bar and S chart are more accurate in predicting out-of-control situations than the x bar and R charts, in the case of high sample size. Correct Answer True

X bar and R charts have a high level of β- risk when the sample size is high. This means they lose their efficiency at high or moderate sample sizes. So x bar and s charts are more accurate than the former ones.

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