The Effect of Tennis Balls Inside Aluminum Baseball
The Effect of Tennis Balls Inside Aluminum Baseball Bats on the Distance a Baseball is Hit Alex Helbsing Whit Duncan
Agenda �Problem Definition �Experimental Design �Experimental Procedure �Results �Conclusion
Problem Definition �In baseball it is desirable to hit the ball as far as possible. �Players will illegally modify bats with cork, or sometimes tennis balls. �Place tennis balls inside aluminum bats to see if the baseball will travel farther.
Experimental Design �Experiment Factor: �Tennis Balls Inside Bat � Treatment Levels: 0, 1, 2 �Blocking Factor: �Three Different Batters �Response Variable: Distance(ft) �Number of Replications: n=6
The Bats Bat with 2 Balls Inside
Experimental Design • Randomized Complete Block Design
Experimental Procedure �Setup: � Put sticks in ground labeled with batter and number of tennis balls
Setup
Procedure: �Step 1: Helper hands bat to batter. �Step 2: The batter hits the ball. �Step 3: Person in outfield places stake in ground. �Step 4: Every nine hits the distances were measured and recorded. This gave the batters a break in between hits.
Batters: Alex: Batter 1 Whit: Batter 2 Dan: Batter 3
Results �ANOVA Table Analysis of Variance for Distance, using Adjusted SS for Tests Source Balls Batter Error Total DF 2 2 49 53 Seq SS 519. 4 12308. 9 20343. 0 33171. 2 Adj SS 519. 4 12308. 9 20343. 0 Adj MS 259. 7 6154. 4 415. 2 F 0. 63 14. 82 P 0. 539 0. 000
Results: Residuals Plot �Residuals
Results • Farthest Distance: 1 Ball. However still insignificant. • Batter three was the best batter.
Results �Tested the response vs. each batter Batter 1: Analysis of Variance for 1 Distance, using Adjusted SS for Tests Source 1 Balls Error Total Batter 2: Seq SS 126. 9 4633. 9 4760. 8 Adj SS 126. 9 4633. 9 Adj MS 63. 4 308. 9 F 0. 21 P 0. 817 Analysis of Variance for 2 Distance, using Adjusted SS for Tests Source 2 Balls Error Total Batter 3: DF 2 15 17 Seq SS 286. 9 2554. 6 2841. 5 Adj SS 286. 9 2554. 6 Adj MS 143. 4 170. 3 F 0. 84 P 0. 450 Analysis of Variance for 3 Distance, using Adjusted SS for Tests Source 3 Balls Error Total DF 2 15 17 Seq SS 225. 5 13034. 5 13260. 1 Adj SS 225. 5 13034. 5 Adj MS 112. 8 869. 0 F 0. 13 P 0. 879
Conclusions �Placing tennis balls inside will not help a player hit the ball out of the park! �Other Factors: �Different types of tennis balls �Different types of bats �Experience level of batters
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