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Sporting goods manufacturing company wanted to compare the distance traveled by golf balls produced using each of four different designs. Ten balls were manufactured with each design and were brought to the local golf course for the club professional to test. The order in which the balls were hit with the same club from the first tee was randomized so that the pro did not know which type of ball was being hit. All 40 balls were hit in a short period of time, during which the environmental conditions were essentially the same. The results for the four designs were as follow:
Design
1
2
3
4
206.32
207.94
206.19
204.45
209.65
203.81
206.75
205.68
204.49
210.86
217.08
221.43
218.04
224.13
211.82
213.90
221.28
229.43
213.54
214.51
226.77
224.79
229.75
228.51
221.44
223.85
223.97
234.30
219.50
233.00
230.55
227.95
231.84
224.87
229.49
231.10
221.53
235.45
228.35
225.09
At the 0.05 level of significance, is there evidence of a difference in the mean distances traveled by the golf balls with different designs?
Revised tables or figures based on prior instructor feedback. Summary of the results of testing the null hypothesis, with a clear statement whether or not the null hypothesis was rejected
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