The number of days (X) after mailout it takes a utility company to receive payment for a
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Question:
The number of days (X) after mailout it takes a utility company to receive payment for a customer’s bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days. The probability is 0.997 that a bill will be received between which of the following number of days?
A (13, 49)
B (19, 43)
C (25, 37)
Related Book For
Probability and Random Processes With Applications to Signal Processing and Communications
ISBN: 978-0123869814
2nd edition
Authors: Scott Miller, Donald Childers
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