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The amount of time that a drive-through bank teller spends on a customer is a random variable with a mean μ = 5.9 minute
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The amount of time that a drive-through bank teller spends on a customer is a random variable with a mean μ = 5.9 minute
The amount of time that a drive-through bank teller spends on a customer is a random variable with a mean μ = 5.9 minutes and a standard deviation o=3.0 minutes. If a random sample of 36 customers is observed, find the probability that their mean time at the teller's window is (a) at most 4.6 minutes; (b) more than 6.9 minutes; (c) at least 5.9 minutes but less than 6.7 minutes. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table.