The length of time (in seconds) that a user views a page on a Web site before moving to another page is a lognormal random variable with parameters θ = 0.5 and ω2 = 1. a. What is the probability that a page is viewed for more than 10 seconds? b. By what length of time have 50% of the users moved to another page? c. What are the mean and standard deviation of the time until a user moves from the page?

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