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The Mean of the Sample Means and the Pooled Standard

Question 13

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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 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 ,and S = 12,respectively.The lower control limit and the upper control limit of the 3-sigma chart are 408 and 432,respectively. ,and S = 12,respectively.The lower control limit and the upper control limit of the 3-sigma 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 ,and S = 12,respectively.The lower control limit and the upper control limit of the 3-sigma chart are 408 and 432,respectively. chart are 408 and 432,respectively.

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