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waiting times(in minutes) of customers at a bank where all customers enter a single waiting line and a bank where

customers wait in individual line at 3 different teller windows are listed below. find the coefficient of variation for each of the 2 set of data , then compare the variation:

Bank A (single line): 6.6 6.7 6.7 6.8 7.0 7.3 7.5 7.7 7.8 7.8

Bank B (individual lines): 4.0 5.5 5.8 . 6.2 6.6 7.6 7.7 8.5 9.4 9.7

The coefficient of variation for the waiting time at Bank A is how many percent?

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