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Web crawlers need to estimate the frequency of changes to Web sites to maintain a current index for Web searches. Assume that the changes to
Web crawlers need to estimate the frequency of changes to Web sites to maintain a current index for Web searches. Assume that the changes to a Web site follow a Poisson process with a mean of 1 change every 3.5 days.
- What is the probability that the next change occurs in less than two days?
- What is the probability that the next change occurs in greater than seven days?
- What is the time of the next change that is exceeded with probability 90%?
- What is the probability that the next change occurs in less than 10 days, given that it has not yet occurred after three days?
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