STAT homework : mathematics expert
The length of time bank customers must wait for a teller are normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. What percentage of customers wait between 2 and 3.5 minutes?
The length of time bank customers must wait for a teller are normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. What percentage of customers wait between 2 and 3.5 minutes?