Checkout time at a supermarket is monitored using a mean and a range chart. Six samples of n = 20 observations have been obtained and the sample means and ranges computed:SampleMeanRange13.06 .4223.15 .5033.11 .4143.13 .4653.06 .4663.09 .45 Using the factors in Table 10.3 , determine upper and lower limits for mean and range charts. Is the process in control?

Answered: Checkout time at a supermarket is…

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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Checkout time at a supermarket is monitored using a mean and a range chart. Six samples of n = 20 observations have been obtained and the sample means and ranges computed:

Sample	Mean	Range
1	3.06	.42
2	3.15	.50
3	3.11	.41
4	3.13	.46
5	3.06	.46
6	3.09	.45

Using the factors in Table 10.3 , determine upper and lower limits for mean and range charts.
Is the process in control?

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