question archive The time spent by students working on a project s a normal random variable with parameters μ=12 hours and σ=4 hours
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The time spent by students working on a project s a normal random variable with parameters μ=12 hours and σ=4 hours. Compute the probability that (a) the amount of time spent on the project is less than 4 hours; and (b) amount of time spent on the project is greater than 8 hours.