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 Yes No

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 Yes No

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter14: Data Mining

Section14.2: Classification Methods

Problem 11P

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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

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.

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