Answered: TABLE 3.5 SAMPLE DATA FOR DATA TECH…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

The manager of the customer service department of Data
Tech Credit Card Service Company is concerned about the
number of defects produced by the billing process. Every day
a random sample of 250 statements was inspected for errors regarding incorrect entries involving account numbers,
transactions on the customer’s account, interest charges, and
penalty charges. Any statement with one or more of these
errors was considered a defect. The study lasted 30 days and
yielded the data in Table 3.5.
a. Construct a p-chart for the billing process.
b. Is there any nonrandom behavior in the billing process
that would require management attention?

TABLE 3.5 SAMPLE DATA FOR DATA TECH CREDIT CARD SERVICE
Samples
Number of Errors in Sample of 250
1-10
3
8.
11
7
1
12
8.
11-20
3
7
9.
11
2
9.
13
4
21-30
12
10
2
1
7
10
5
8
4

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