Bus interarrival times. In the Social and Natural Sciences Journal (Vol. 6, 2012), the time x (in

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Bus interarrival times. In the Social and Natural Sciences Journal (Vol. 6, 2012), the time x (in minutes) between two successive arrivals of buses was modeled using an exponential distribution with mean u = 3.77.

a. Give the value of E(x).

b. What is the standard deviation of x?

c. Find P1x 7 52. Interpret this probability in the words of the problem.

d. Find P12.5 6 x 6 3.52. Interpret this probability in the words of the problem.

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Statistics Plus New Mylab Statistics With Pearson Etext Access Card Package

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Bus interarrival times. In the Social and Natural Sciences Journal (Vol. 6, 2012), the time x (in

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Statistics Plus New Mylab Statistics With Pearson Etext Access Card Package

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