Suppose the United States Golf Association wants to compare the distances associated with four different brands of golf clubs when struck with a driver. Iron Byron, the USGA’s robotic golfer, is used to hit a random sample of ten balls of each brand in a random sequence. The distance is recorded for each hit, and the results are shown below.

*Analyze the data using a=.05. Perform multiple comparisons if necessary.

Brand A Brand B Brand C Brand D
251.2 263.2 269.7 251.6
245.1 262.9 263.2 248.6
248 265 277.5 249.4
251.1 254.5 267.4 242
265.5 264.3 270.5 246.5
250 257 265.5 251.3
253.9 262.8 270.7 262.8
244.6 264.4 272.9 249
254.6 260.9 275.6 247.1
248.8 255.9 266.5 245.9