Refer to the Wheat Chex problem 17.56 with = 465 and = 3. During production,

Refer to the Wheat Chex problem 17.56 with μ = 465 and σ = 3. During production, samples of three boxes are weighed every 5 minutes.
(a) Find the upper and lower control limit for the x chart.
(b) Plot the following 20 sample means on the chart. Is the process in control?

Transcribed Image Text:

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