Suppose Golf Magazine would like to do an article comparing the driving distances of various golf balls. Eight golfers were asked to hit Top Flite, Pinnacle, and Titleist golf balls with their drivers. The distance for each shot was measured in yards and is as follows. The file golf balls.xlsx also contains these data.

Golfer Top Flite Pinnacle Titleist 1 217 202 205 2 228 270 228 3 226 237 224 4 214 257 249 5 236 274 267 6 229 252 230 7 241 242 237 8 233 242 230

a. Using a = 0.05, does there appear to be a difference in the driving yardage of the balls?

b. Was blocking effective? Why or why not?

c. If warranted, determine which pairs of balls were different using a = 0.05.

d. Verify your results with Excel.

AppendixLO1