Refer to the Wheat Chex problem 17.56.with µ=465and σ=3.During production, samples of three boxes are weighed every 5minutes. (a) Find the upper and lower control limit for the chart (b) Plot the following 20 sample means on the chart. Is the process in control?
465.7 | 463.7 | 466.0 | 466.3 | 463.0 | 468.3 | 465.0 | 463.3 | 462.0 | 463.0 |
465.7 | 467.0 | 463.3 | 466.0 | 465.3 | 465.3 | 463.0 | 466.7 | 466.3 | 466.3 |
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