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Q1 a) The amount of time spouses shop for anniversary cards can be modeled by an...

Q1

a) The amount of time spouses shop for anniversary cards can be modeled by an exponential distribution with the average amount of time equal to 6 minutes. Write the distribution along with the appropriate parameter, state the probability density function, and graph the distribution.

b) The number of days ahead travelers purchase their airline tickets can be modeled by an exponential distribution with the average amount of time equal to 10 days. Find the probability that a traveler will purchase a ticket fewer than eight days in advance.

c) On the average, a certain computer part lasts eight years. The length of time the computer part lasts is exponentially distributed. What is the probability that a computer part lasts more than 6 years?

Math   Statistics-And-Probability   
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