madmacc4235 madmacc4235
  • 23-05-2023
  • Mathematics
contestada

The amount of time that a drive-through bank teller spends on a customer is a random variable with a mean minutes and a standard deviation minutes. If a random sample of 64 customers is observed, find the probability that their mean time at the teller’s window is:
a) At most 2.7 minutes
b) more than 3.5 minutes

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