A hotel manager looks to enhance the initial impressions that hotel guests have when they check in. Contributing to initial impressions is the time it takes to deliver a guest's luggage to the room after check-in. A random sample of 20 deliveries on a particular day was selected in Wing A of the hotel, and a random sample of 20 deliveries was selected in Wing B. The results are stored in Luggage. Analyze the data and determine whether there is a difference between the mean delivery times in the two wings of the hotel. (Use a = 0.05.)