The number of traffic accidents that occur on a particular stretch of road during a month follows
a Poisson distribution with a mean of 8.5 .
Find the probability that exactly four accidents will
occur on this stretch of road each of the next two months.
A) 0.000144 B) 0.088510 C) 0.044255 D) 0.001958
Q. 2The number of traffic accidents that occur on a particular stretch of road during a month follows
a Poisson distribution with a mean of 8.9 . Find the probability of observing exactly four
accidents on this stretch of road next month.
A) 0.035656 B) 1.296886 C) 174.158539 D) 4.788184
Q. 3Suppose that 50 and 75 are two elements of a population data set and their z-scores are
-3 and 2, respectively. Find the mean and standard deviation.
What will be an ideal response?
Q. 4The number of traffic accidents that occur on a particular stretch of road during a month follows
a Poisson distribution with a mean of 8.8 . Find the probability that fewer than three accidents
will occur next month on this stretch of road.
A) 0.992686 B) 0.975566 C) 0.007314 D) 0.024434
Q. 5The z-score for a value x is -2.5. State whether the value of x lies above or below the
mean and by how many standard deviations.
What will be an ideal response?
Q. 6The number of road construction projects that take place at any one time in a certain city follows
a Poisson distribution with a mean of 6. Find the probability that more than four road
construction projects are currently taking place in the city.
A) 0.285057 B) 0.151204 C) 0.848796 D) 0.714943
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