# Question

Use all 60 observations on oxide thickness.

(a) Set up an individuals control chart with σ estimated by the average moving range method.

(b) Set up an individuals control chart with σ estimated by the median moving range method.

(c) Compare and discuss the two control charts.

(a) Set up an individuals control chart with σ estimated by the average moving range method.

(b) Set up an individuals control chart with σ estimated by the median moving range method.

(c) Compare and discuss the two control charts.

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