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1. Consider a process with µ0 = 10 and σ = 1. Set up 3σ EWMA control charts for λ = 0.1, 0.2, and 0.4. Discuss the effect of λ on the behavior of the control limits.

2. The data below come from a process with two observable quality characteristics. The data are the means of each characteristic, based on a sample size of n = 25. The nominal values and covariance matrix are

734_c98cf52f-ab67-4638-84e7-e8e5f59b4921.png

Construct the T2 control chart using these data.

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