A deli serves its customers by handing out tickets with

Last updated: 7/28/2022

A deli serves its customers by handing out tickets with numbers and serving customers In that order. With this method, the standard deviation in wait times is 4.5 min. Before they established this system, they used to just have the customers stand in line, and the standard deviation was 6.8 min. At a=0.05, does the number system reduce the standard deviation in wait times? Test using a hypothesis test.