On a random basis, Bob buys a small take-out coffee from one of two restaurants. As a statistics project in the month of May, he measured the temperature of each cup immediately after purchase, using an analog cooking thermometer. Assuming equal variances, is the mean temperature higher at Panera than at Bruegger's at α = .01?

171 161 9 179 171 166 169 178 17 165 172 172 Brueggers 168 165 162 158 7 10 158 160 8 164