# Question: A bank has a drive through service The number of customers

A bank has a drive-through service. The number of customers arriving during a 15-minute period is distributed as shown. Find the mean, variance, and standard deviation for the distribution.

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At a small rural airport, the number of arrivals per hour during the day has the distribution shown. Find the mean, variance, and standard deviation for the data. To the left of z = –1.39 Find the area under the standard normal distribution curve. To the left of z = 1.31 Find the area under the standard normal distribution curve. P (– 1.23 < z < 0) Find the probabilities for each, using the standard normal distribution. P (1.46< z < 2.97) Find the probabilities for each, using the standard normal distribution.Post your question