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Find the probability that their mean time

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Reference no: EM132952251

Question:

The amount of time that a drive-through bank teller spend on a customer is a random variable with μ = 3.2 minutes and σ = 1.6 minutes. If a random sample of 64 customers is observed, find the probability that their mean time at the teller's counter is

a) at most 2.7 minutes

b) more than 3.5 minutes

c) at least 3.2 minutes but less than 3.4 minutes

Reference no: EM132952251

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