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Mathematics, 22.06.2019 20:10 sav035

Acompany makes molded plastic toys. in‑house researchers measure the hardness of the plastic after it cools for five minutes. the process has been in control, with a mean =5.6 and a standard deviation =1.6. each hour, a sample of size nine is taken for quality control. what are the control limits for an ¯ chart? 5.07 to 6.13 4 to 7.2 4.55 to 6.65

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