Telephone inquiries of 100 IRS “customers” aremonitored daily at random. Incidents of incorrect informationor other nonconformities (such as impoliteness to customers)are recorded. The data for last week follow:DAY NO. OF NONCONFORMITIES1 52 103 234 205 15 a) Construct a 3-standard deviation c -chart of nonconformities.b) What does the control chart tell you about the IRS telephoneoperators?
Telephone inquiries of 100 IRS “customers” aremonitored daily at random. Incidents of incorrect informationor other nonconformities (such as impoliteness to customers)are recorded. The data for last week follow:DAY NO. OF NONCONFORMITIES1 52 103 234 205 15 a) Construct a 3-standard deviation c -chart of nonconformities.b) What does the control chart tell you about the IRS telephoneoperators?
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
Telephone inquiries of 100 IRS “customers” are
monitored daily at random. Incidents of incorrect information
or other nonconformities (such as impoliteness to customers)
are recorded. The data for last week follow:
DAY NO. OF NONCONFORMITIES
1 5
2 10
3 23
4 20
5 15
a) Construct a 3-standard deviation c -chart of nonconformities.
b) What does the control chart tell you about the IRS telephone
operators?
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