Sample Number Wrong Account Numbers Sample Number Wrong Account Numbers 1 15 7 24 12 8 7 19 9 10 2 10 17 19 11 15 6 12 3 Total 147 3. 4.

Understanding Business
12th Edition
ISBN:9781259929434
Author:William Nickels
Publisher:William Nickels
Chapter1: Taking Risks And Making Profits Within The Dynamic Business Environment
Section: Chapter Questions
Problem 1CE
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The operations manager of the
booking services department
of Hometown Bank is concerned about the number of
wrong customer account numbers recorded by Hometown
personnel. Each week a random sample of 2,500 deposits
is taken, and the number of incorrect account numbers is recorded. The results for the past
12 weeks are shown in the
following table. Is the booking
process out of statistical control? Use three-sigma control
limits, which will provide a type
I error of 0.26 percent.

Sample Number
Wrong Account Numbers
Sample Number
Wrong Account Numbers
1
15
7
24
12
8
7
19
9
10
2
10
17
19
11
15
6
12
3
Total 147
3.
4.
Transcribed Image Text:Sample Number Wrong Account Numbers Sample Number Wrong Account Numbers 1 15 7 24 12 8 7 19 9 10 2 10 17 19 11 15 6 12 3 Total 147 3. 4.
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