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a two-sided confidence interval for the mean difference of NO, emissions. Is the confidence interval compatible with your conclusion above? Explain your answer. Exercise 2: 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 2.4 days. (a) What is the mean of time until the next change? (b) What is the probability that the next change occurs in more than 2.0 days? (c) What is the probability that the time until the next change is less than 6.0 days? (d) What is the time of the next change that is exceeded with probability 95%? (e) What is the probability that the next change occurs in less than 8.0 days, given that it has not yet occurred after 4.0 days?
math   Statistics-And-Probability   
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λ=2.4 , P(x:x) 0 12.4) e 12.4) e(2.4) 2 1 2.4 + 2.42 2- -O. 430 3 5-2-4 0.96 4 3 田 こら一2. e 2.1 (24 一2-4 χι 0.0592 0.952 O.0 958 7

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