The mean of the sample means and the pooled standard deviation of 40 samples of size 9
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The mean of the sample means and the pooled standard deviation of 40 samples of size 9 taken from a production process under control are shown here. Compute the centerline, control limits, and zone boundaries for the x chart.
x̅ = 181.1 S = 11.0
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Centerline x 1811 Lower control lim...View the full answer
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