HW3 Solution - Process is in statistical control Use these...

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7.10. (a) np new = 20.0 > 15, so use normal approximation to binomial distribution. Pr{detect by at least 3 rd } = 1 – Pr{detected after 3rd} = 1 – (1 – 0.030) 3 = 0.0873 (b) Assuming L = 3 sigma control limits, So, n = 48 is the minimum sample size for a positive LCL. 7.11.
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7.40. c chart based on # of nonconformities per tape deck MTB > Stat > Control Charts > Attributes Charts > C
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Unformatted text preview: Process is in statistical control. Use these limits to control future production. 7.42. (a) The new inspection unit is n = 4 tape decks. A c chart of the total number of nonconformities per inspection unit is appropriate. (b) The sample is n =1 new inspection units. A u chart of average nonconformities per inspection unit is appropriate....
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