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15 February, 23:28

Data collected at Toronto Pearson International Airport suggests that an exponential distribution with mean value 2.725 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?

(b) What is the probability that rainfall duration exceeds the mean value by more than 2 standard deviations?

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  1. 16 February, 00:20
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    The answer is b because the literal equation equals to the same time I you have no idea why
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