OMHW4.wps

# OMHW4.wps - D Centerline 2.08 Upper Control Limit 3.11...

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OM 300- HW4 Problem 1 A. Mean Sample 1- 25.56 Sample 2- 25.21 Sample 3- 25.87 Sample 4- 25.27 Sample 5- 25.99 Sample 6- 25.81 Average Mean- 25.62 B. Range Sample 1- 26.11- 24.81=1.3 Sample 2- 26.29- 23.93=2.36 Sample 3- 27.24-24.21=3.03 Sample 4- 26.29-24.57=1.72 Sample 5- 27.8-24.69=3.11 Sample 6- 26.31-25.33=.98 C. Centerline- 25.62 Upper Control Limit- 25.99 Lower Control Limit- 25.21
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Unformatted text preview: D. Centerline- 2.08 Upper Control Limit- 3.11 Lower Control Limit- .98 Problem 2 Sigma P= .09(.09*(1-.09)/20)) .91/20= .0455*.09*.09= .003726 √ .003726 = .061 B. The number of defective tires is increasing. They need to stop the machines and figure out what the problem is. This will save time and money....
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