Unformatted text preview: the shopper was in line. The rate of checkout errors was also recorded. Our objective at this time is to determine if there a statistically significant difference in the error rates between the two systems. The data is represented in the table below. Table A-1: Contingency Table on System’s Number of Errors Error No Error Total Cashier Checkout System 15 772 787 Electronic Self- Checkout System 50 711 761 Total 65 1483 1548...
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- Fall '08