Chapter 5: Q.14 (page 311)
Find the probability that x falls in the shaded area.

Short Answer
The probability that falls in the shaded area is:
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Chapter 5: Q.14 (page 311)
Find the probability that x falls in the shaded area.

The probability that falls in the shaded area is:
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A fireworks show is designed so that the time between fireworks is between one and five seconds, and follows a uniform
distribution.
a. Find the average time between fireworks.
b. Find probability that the time between fireworks is greater than four seconds.
98. During the years 1998-2012, a total of 29 earthquakes of magnitude greater than 6.5 have occurred in Papua New Guinea. Assume that the time spent waiting between earthquakes is exponential.
a. What is the probability that the next earthquake occurs within the next three months?
b. Given that six months have passed without an earthquake in Papua New Guinea, what is the probability that the next three months will be free of earthquakes ?
c. What is the probability of zero earthquakes occurring in 2014?
d. What is the probability that at least two earthquakes will occur in 2014 ?
In a small city, the number of automobile accidents occur with a Poisson distribution at an average of three per week.
a. Calculate the probability that there are at most accidents occur in any given week.
b. What is the probability that there is at least two weeks between any accidents?
A random number generator picks a number from one to nine in a uniform manner.
a. X ~ _________
b. Graph the probability distribution.
c. f(x) = _________
d. μ = _________
e. σ = _________
f. P(3.5 < x < 7.25) = _________
g. P(x > 5.67)
h. P(x > 5|x > 3) = _________
i. Find the 90th percentile
At an urgent care facility, patients arrive at an average rate of one patient every seven minutes. Assume that the duration between arrivals is exponentially distributed.
a. Find the probability that the time between two successive visits to the urgent care facility is less than minutes.
b. Find the probability that the time between two successive visits to the urgent care facility is more than minutes.
c. If minutes have passed since the last arrival, what is the probability that the next person will arrive within the next five minutes?
d. Find the probability that more than eight patients arrive during a half-hour period.
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