"Since the implementation of an SPC program in the foundry department in January 1990, theengineers had made one change in the foundry operations, which appear to have resulted ina reduction in the scrap rate from the 1989 average rate of 28% (the standard deviation was2%)."The table summarizes the weekly scrap rate data for the first half of 1990.i12345678910111213Xi26.425.331.827.128.520.219.322.720.419.521.72422.6Construct a CUSUM chart to analyze the data for the purpose of verifying the engineer'sclaim regarding the scrap reduction. (h=5 and k =0.25).(b)When is process last in control?(c)What is the magnitude of the mean shift?(a)

Given,ixi126.4225.3331.8427.1528.5620.2719.3822.7920.41019.51121.712241322.6(a)Define…

(a) Construct a CUSUM chart to analyze the data for the purpose of verifying the engineer's claim regarding the scrap reduction. (h=5 and k=0.25). (b) When is process last in control? (c) What is the magnitude of the mean shift?

(a) Construct a CUSUM chart to analyze the data for the purpose of verifying the engineer's claim regarding the scrap reduction. (h=5 and k=0.25). (b) When is process last in control? (c) What is the magnitude of the mean shift?

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter4: Polynomial And Rational Functions

Section4.6: Rational Functions

Problem 11SC: Find the mean hourly cost when the cell phone described above is used for 240 minutes.

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"Since the implementation of an SPC program in the foundry department in January 1990, the
engineers had made one change in the foundry operations, which appear to have resulted in
a reduction in the scrap rate from the 1989 average rate of 28% (the standard deviation was
2%)."
The table summarizes the weekly scrap rate data for the first half of 1990.
i
1
2
3
4
5
6
7
8
9
10
11
12
13
Xi
26.4
25.3
31.8
27.1
28.5
20.2
19.3
22.7
20.4
19.5
21.7
24
22.6
Construct a CUSUM chart to analyze the data for the purpose of verifying the engineer's
claim regarding the scrap reduction. (h=5 and k =0.25).
(b)
When is process last in control?
(c)
What is the magnitude of the mean shift?
(a)

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