The overall distance traveled by a golf ball is tested by hitting the ball with Iron Byron, a mechanical golfer with a swing that is said to emulate the legendary champion, Byron Nelson. Ten randomly selected balls of two brands are tested and the overall distance measured. Assume that the variances are equal. The data follow:

Brand 1: 276 292 287 271 283 271 279 275 263 267
Brand 2: 263 242 260 265 273 281 271 270 263 268

Is there evidence to show that there is a difference in the mean overall distance of brands? Use alpha = 0.05.