Question: Reconsider the viscosity measurements in Exercise 15-22. The specifications are 500 ± 25. Calculate estimates of the process capability ratios PCR and PCR k for

Reconsider the viscosity measurements in Exercise 15-22. The specifications are 500 ± 25. Calculate estimates of the process capability ratios PCR and PCR_kfor this process and provide an interpretation.

Exercise 15-22

The viscosity of a chemical intermediate is measured every hour. Twenty samples each of size n = 1 are in the following table.

Viscosity Sample Sample Viscosity 495 1 11 493 12 2 491 507 3 501 13 503 4 501 14 475 512 15 497 6. 540 16 499 492 17 46

Viscosity Sample Sample Viscosity 495 1 11 493 12 2 491 507 3 501 13 503 4 501 14 475 512 15 497 6. 540 16 499 492 17 468 8. 504 18 486 542 19 511 10 508 20 487

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