Four samples of three observations each have been taken. Sample 1: 12.3, 12, 12.1. Sample 2: 11.9, 12, 12.7. Sample 3: 12, 12.2, 11.8. Sample 4:11.9, 11.8, 11.8. LCL and UCL of X-bar chart are:O a.None of themOb.11.74 and 12.36O C.3.23 and 3.56d.12.00 and 13.24O e.11.63 and 12.45

Answered: Four samples of three observations each…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

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Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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A manager wishes to build a control chart for a process. A total of five (05) samples are collected with five (05) observations within each sample. The sample means (X-bar) are; 15.36, 14.61. 16.36, 20.28, and 15.77 respectively. Also, the corresponding ranges are; 10.79,8.37,4.81, 8.17, and 3.31 respectively. The lower and upper control limits of the x-bar chart are ,respectively O a. 16.55, 11.47 Ob. 12.40, 19.72 Oc. 12.36, 20.59 Od. 18.55, 13.47 De. None is correct
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A process that is assumed to be in control with limits of 91 +2 had sample averages for the X-bar chart of the following: 87.1, 87, 87.2, 89, 90, 88.5, 89.5, and 88. Which of the following statement below are correct? O a. Process mean is not in-control O b. None is correct O c. Process mean is in-control O d. Not enough information to determine
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Time left 0:08:09 In statistical process control, the hourly samples are taken. The sample means are: 156.46, 199.62, 189.31, 102.22, and 112.09 respectively. Also, the ranges of these samples are 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. If the upper control limit of X-bar chart is 157.87, what is the sample size of each sample? O a. 4 O b. 7 O c. 5 O d. 6 O e. None is correct CLEAR MY CHOICE S PAGE NEXT PAGE
Question 49 For the sample data given below, is the process in statistical control ? (for z=3) Observations 1 2 3 4 5 6 7 8 9 10 11 Defects/Unit 9 4 3 5 6 3 4 2 3 2 3 Process is in control None of these There is insufficient data to evaluate the process O Process is not in control
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pleaase solve accurately and with correct formulas thankss
In an existing process, we have found that the lower and upper control limits for X-bar chart are 8.08 and 8.59 respectively. Whereas, the lower and upper control limits for R-chart are 0 to 1.25 respectively. The following measurements for one sample are taken: 8.5, 9.14, 8.28, and 12.77. UsingX-bar chart only, what we can conclude about the process mean O a. Process mean is out-of-control. O b. Process mean is in-control O c. Insufficient information to conclude O d. Overall process is in-control

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Four samples of three observations each have been taken. Sample 1: 12.3, 12, 12.1. Sample 2: 11.9, 12, 12.7. Sample 3: 12, 12.2, 11.8. Sample 4: 11.9, 11.8, 11.8. LCL and UCL of X-bar chart are: