Answered: A process considered to be in control…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

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

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Question

100%

A process considered to be in control measures an ingredient in ounces.

Roberto Baggio, a quality inspector took 20 samples, each with 8 observations as follows:

thats in the pictuer

after that using this information, obtain three-sigma (i.e., z=3) control limits for a mean control chart and control limits for a range chart, respectively. It is known from previous experience that the standard deviation of the process is 0.693.

First: perform all actions and calculations needed to answer the question.

All equations/calculations needed to be fully written STEP by STEP. No short calculations or direct answers/results will be accepted.

This applies to the calculations for both types of control limits (mean and range).

Second: Explain the process followed to identify each type of control limit and any observations made in the problem-solving process.

thank you very much

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thank you for your answer i found something similar on bertleby but the working out is different and the answers are slighilty different too i am not sure which one to use:

this is the answer that i found:

this are his answers but in the picture is working out

X chart values

UCL 11.30

CL 10.57

LCL 9.83

R chart values

UCL 3.67

LCL 0.27