Data collected at an airport suggests that an exponential distribution with mean value 2.675 hours is a good model for rainfall duration. (a) What is the probability that the duration of a particular rainfall event at this location is at least 2 hours? At most 3 hours? Between 2 and 3 hours? (Round your answers to four decimal places.) at least 2 hours 0.4735 at most 3 hours 0.6742 between 2 and 3 hours 0.1477 (b) What is the probability that rainfall duration exceeds the mean value by more than 4 standard deviations? (Round your answer to four decimal places.) 0.0067 What is the probability that it is less than the mean value by more than one standard deviation? 0.8646

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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Data collected at an airport suggests that an exponential distribution with mean value 2.675 hours is a good model for
rainfall duration.
(a) What is the probability that the duration of a particular rainfall event at this location is at least 2 hours? At most
3 hours? Between 2 and 3 hours? (Round your answers to four decimal places.)
at least 2 hours
0.4735
at most 3 hours
0.6742
between 2 and 3 hours
0.1477
(b) What is the probability that rainfall duration exceeds the mean value by more than 4 standard deviations? (Round
your answer to four decimal places.)
0.0067
What is the probability that it is less than the mean value by more than one standard deviation?
0.8646
Transcribed Image Text:Data collected at an airport suggests that an exponential distribution with mean value 2.675 hours is a good model for rainfall duration. (a) What is the probability that the duration of a particular rainfall event at this location is at least 2 hours? At most 3 hours? Between 2 and 3 hours? (Round your answers to four decimal places.) at least 2 hours 0.4735 at most 3 hours 0.6742 between 2 and 3 hours 0.1477 (b) What is the probability that rainfall duration exceeds the mean value by more than 4 standard deviations? (Round your answer to four decimal places.) 0.0067 What is the probability that it is less than the mean value by more than one standard deviation? 0.8646
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