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Homework%206%20-%20Chapter%208%20solutions

# Homework%206%20-%20Chapter%208%20solutions - ≈ 16,395...

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Chapter 8 Exercise Solutions 8.1. 8.9. Assume n = 5 Process A Process B

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8.9 continued Prefer to use Process B with estimated process fallout of 0.000001 instead of Process A with estimated fallout 0.001726. 8.10. Process A: Process B: Process B will result in fewer defective assemblies. For the parts indicates that more parts from Process B are within specification than from Process A. 8.17. MTB > Stat > Basic Statistics > Normality Test The plot shows that the data is not normally distributed; so it is not appropriate to estimate capability. 8.18. LSL = 75; USL = 85; n = 25; S = 1.5 (a)
(b) This confidence interval is wide enough that the process may either be capable (ppm = 27) or far from it (ppm

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Unformatted text preview: ≈ 16,395). 8.23. 8.27. (a) Gauge capability: (b) MTB > Stat > Control Charts > Variables Charts for Subgroups > X-bar R Test Results for R Chart of Ex8.27All TEST 1. One point more than 3.00 standard deviations from center line. Test Failed at points: 11, 12 Out-of-control points on R chart indicate operator difficulty with using gage. Suggested 8.15. MTB > Stat > Basic Statistics > Normality Test (Add percentile lines at Y values 50 and 84 to estimate μ and σ .) A normal probability plot of response times shows the distribution is close to normal. (a) (b) USL = 2 hrs = 120 mins 8.21. USL = 2350; LSL = 2100; nominal = 2225; (a) (b)...
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