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Chapter 8: Discrete Probability Distributions
Example 8-20
: At a health clinic, appointment cancellations occur at a
mean rate of 2 per day on a typical Monday. Let the number of
cancellations on a particular Monday be represented by the random variable
X
.
(a) What is the probability that
no
cancellations will occur on a particular
Monday?
Solution:
(a) The time period
= 1 since the average is given as per day
and thus a Monday will represent a time period of 1 day. Also, the average
number of cancellation is
= 2 and
X
= 0. Now,
That is, the probability of no cancellation is 0.1353, correct to four decimal
places.