The data represent individual observations on bath concentration from a chemical process. The target value is 10 and the process standard deviation is given as o = 0.8. (a) Use k = 0.5 and h =5, built a tabular CUSUM to quickly detect a shift of about lo in the process mean. Based on the tabular CUSUM, please conclude whether the process has a mean shift using h=5. If the process has a mean shift, please indicate at which sample this mean shift started.

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The data represent individual observations on bath concentration from a chemical process. The target value is 10 and the process standard deviation is given as o = 0.8. (a) Use k = 0.5 and h =5, built a tabular CUSUM to quickly detect a shift of about lo in the process mean. Based on the tabular CUSUM, please conclude whether the process has a mean shift using h=5. If the process has a mean shift, please indicate at which sample this mean shift started.
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xi
9.45
7.99
9.29
11.66
12.16
10.18
8.04
11.46
9.2
10.34
9.03
11.47
10.51
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10.08
9.37
10.62
10.31
8.52
10.84
10.9
9.33
12.29
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11.08
10.38
11.62
11.31
10.52
Transcribed Image Text:i 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 xi 9.45 7.99 9.29 11.66 12.16 10.18 8.04 11.46 9.2 10.34 9.03 11.47 10.51 9.4 10.08 9.37 10.62 10.31 8.52 10.84 10.9 9.33 12.29 11.5 10.6 11.08 10.38 11.62 11.31 10.52
Q1. Download the dataset from Canvas. The data represent individual observations on bath concentration
from a chemical process. The target value is 10 and the process standard deviation is given as o=0.8.
(a) Use k = 0.5 and h=5, built a tabular CUSUM to quickly detect a shift of about 10 in the process mean.
Based on the tabular CUSUM, please conclude whether the process has a mean shift using h=5. If the
process has a mean shift, please indicate at which sample this mean shift started.
(b) Estimate the magnitude of the mean shift and calculate the 8= μ₁ -μ/0.
(c) Calculate out-of-control ARL: (using the approximated formula) for the two-sided CUSUM.
Q2.
Use the same dataset as in Question 6. Mo = 10 and o=0.8 are the same as before.
(a) Using λ = 0.1 and L=3, please construct an EWMA chart, also please indicate at which sample the out-
of-control condition is detected.
(b) What are the steady state values of control limits for the EWMA chart in part (a).
Transcribed Image Text:Q1. Download the dataset from Canvas. The data represent individual observations on bath concentration from a chemical process. The target value is 10 and the process standard deviation is given as o=0.8. (a) Use k = 0.5 and h=5, built a tabular CUSUM to quickly detect a shift of about 10 in the process mean. Based on the tabular CUSUM, please conclude whether the process has a mean shift using h=5. If the process has a mean shift, please indicate at which sample this mean shift started. (b) Estimate the magnitude of the mean shift and calculate the 8= μ₁ -μ/0. (c) Calculate out-of-control ARL: (using the approximated formula) for the two-sided CUSUM. Q2. Use the same dataset as in Question 6. Mo = 10 and o=0.8 are the same as before. (a) Using λ = 0.1 and L=3, please construct an EWMA chart, also please indicate at which sample the out- of-control condition is detected. (b) What are the steady state values of control limits for the EWMA chart in part (a).
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