Let X be the total time to process a passport application by the state depart- ment. It is known that X is uniformly distributed between 3 and 7 weeks. (a) Find f(x). (b) What is the probability that an application will be processed in fewer than 3 weeks ? (c) What is the probability that an application will be processed in 5 weeks or less ?

Let X be the total time to process a passport application by the state depart- ment. It is known that X is uniformly distributed between 3 and 7 weeks. (a) Find f(x). (b) What is the probability that an application will be processed in fewer than 3 weeks ? (c) What is the probability that an application will be processed in 5 weeks or less ?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Concept explainers

Continuous Probability Distributions

Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.

Normal Distribution

Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!

Question

Problem 33.1
Let X be the total time to process a passport application by the state depart-
ment. It is known that X is uniformly distributed between 3 and 7 weeks.
(a) Find f(x).
(b) What is the probability that an application will be processed in fewer
than 3 weeks ?
(c) What is the probability that an application will be processed in 5 weeks
or less ?

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