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DSC Quiz 3 pg 1

# DSC Quiz 3 pg 1 - DSC205 Quiz#3(25 pts Name Chapter 14 —...

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Unformatted text preview: DSC205 Quiz #3 (25 pts) Name October 24, 2007 Chapter 14 — Control Charts Section Show all your work for full credit. A ﬁlling machine for a tea bag manufacturer produces approximately 170 tea bags per minute. The process manager wants to monitor the weight of the tea (in grams) plaCed in individual bags using X—bar and R charts.- A subgroup of 4 teabags is taken every 15 minutes for 25 consecutive time periods to establish process-«monitoring limits. The following results were collected: x—bar R 1. Determine process-monitoring limits for l 5.55 0.45 X—bar and R charts. Clearly label your trial 2 5.50 0.23 7 , limits before the process is in statistical 3 5.55 0.27 control. Assumethat assignable causes can 4 5.42 0.18 be found and eliminated. 5 5.48 0.08 ' W2 7 5.51 0.17 8 5.53 0.17 ~9—-———-5«.-§3—~—-0=§6- 10 5.50 0.1.4 11 5.57 0.03 12 5.48 0.22 13 , 5.60 0.29 14 5.49 0.16 15 ' 5.46 0.21 +6~——5:68»—-0.—1—3 17 5.45 0.11 18 5.48 0.47 19. 5.46 0.22 20 5.41. 0.19 21 5.56 0.14 22 5.48 029 23 5.55 0.22 24 5.56 0.37 25 5.64 0.26; Sum 137.74 5.78 ...
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