A First Course in Probability (10th Edition)
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ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Transcribed Image Text:5. The overnight shipping business has skyrocketed in the last ten years. The single greatest
predictor of a company's success is customer service. A study was conducted to determine the
customer satisfaction levels for one overnight shipping business. In addition to the customer's
satisfaction level, the customers were asked how often they used overnight shipping. The results
are shown below in the following table:
Satisfaction level
Frequency of Use
<2 per month
2-5 per month
>5 per month
TOTAL
High
250
Low
Medium
TOTAL
400
140
10
5.
5.
55
200
140
100
25
70
20
700
220
460
A customer is chosen at random. Given that the customer uses the company two to five times per month,
what is the probability that the customer expressed medium satisfaction with the company?
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