Answered: a. Determine three-sigma control limits…

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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Problem 10-7 (Algo)

The postmaster of a small western town receives a certain number of complaints each day about mail delivery.

	DAY
	1	2	3	4	5	6	7	8	9	10	11	12	13	14
Number of complaints	4	12	16	8	9	6	5	13	14	7	6	4	2	10

Click here for the Excel Data File

a. Determine three-sigma control limits using the above data. (Round your intermediate calculations to 4 decimal places and final answers to 3 decimal places. Leave no cells blank - be certain to enter "0" wherever required. Round up any negative control limit value to zero.)

b. Is the process in control?

multiple choice

Expert Solution

Three-Sigma Control Limits

The term "three-sigma limits" refers to a statistical computation in which the data are within three standard deviations of the mean. Three-sigma is a business term that refers to operations that are efficient and create high-quality products. In statistical quality control charts, three-sigma limits are used to determine the upper and lower control limits. Control charts are used to determine limitations for a statistically controlled industrial or commercial process.