Problem 7: The management for a large grocery store chain would like to determine if a new cash register will enable cashiers to process a larger number of items on average than the cash register which they are currently using. Seven cashiers are randomly selected, and the number of grocery items which they can process in three minutes is measured for both the old cash register and the. New cash register. The results of the test are as follows. Number of Grocery Items Processed in Three Minutes Cashier 1 2 3 4 5 6 7 Old Cash Register 60 70 55 75 62 52 58 New Cash Register 65 71 55 75 65 57 57 Perform the Wilcoxon signed-rank test on the above data, given α = 0.05.

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