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The distance between major cracks in a highway follows an
Chapter 4, Problem 124E(choose chapter or problem)
Problem 124E
The distance between major cracks in a highway follows an exponential distribution with a mean of five miles.
(a) What is the probability that there are no major cracks in a 10-mile stretch of the highway?
(b) What is the probability that there are two major cracks in a 10-mile stretch of the highway?
(c) What is the standard deviation of the distance between major cracks?
(d) What is the probability that the first major crack occurs between 12 and 15 miles of the start of inspection?
(e) What is the probability that there are no major cracks in two separate five-mile stretches of the highway?
(f) Given that there are no cracks in the first five miles inspected, what is the probability that there are no major cracks in the next 10 miles inspected?
Questions & Answers
QUESTION:
Problem 124E
The distance between major cracks in a highway follows an exponential distribution with a mean of five miles.
(a) What is the probability that there are no major cracks in a 10-mile stretch of the highway?
(b) What is the probability that there are two major cracks in a 10-mile stretch of the highway?
(c) What is the standard deviation of the distance between major cracks?
(d) What is the probability that the first major crack occurs between 12 and 15 miles of the start of inspection?
(e) What is the probability that there are no major cracks in two separate five-mile stretches of the highway?
(f) Given that there are no cracks in the first five miles inspected, what is the probability that there are no major cracks in the next 10 miles inspected?
ANSWER:
Solution:
Step 1 of 5:
The distance between major cracks in a highway have an exponential distribution.
Which have a mean of 5 miles.
- We have to find the probability that there are no major cracks in a 10-mile stretch of the highway.
- We have to find the probability that there are two major cracks in a 10-mile stretch of the highway.
- We have to find the standard deviation of the distance between major cracks.
- We have to find the probability that the first major crack occurs between 12 and 15 miles of the start of inspection.
- We have to find the probability that there are no major cracks in two separate five-mile stretches of the highway.
- We have to find the probability that there are no major cracks in the next 10 miles inspected, if it is given that there are no cracks in the first five miles inspected.