1. Is there a difference with the exit
velocity of a baseball coming off of a
BBCOR or BESR certified aluminum
baseball bat?
BBCOR BESR

2.  In 2011, the NCAA approved and implemented the use
of BBCOR baseball bats
 In 2010, the NCAA was under BESR baseball bats
 Why is it important and why the changes?
 Reduce the exit speed of the baseball.
 Safety
 BBCOR bats perform more like a wood bat
 Speed up the game
 Prepare athletes better for the pros
 It has arguably changed the scope of baseball and how
the game is played. Teams are now having to rely on
bunting more to score runs, rather than relying on
homeruns.
 It changes the way coaches coach and players react!

3.  Velocity: The rate of speed calculated in Miles Per
Hour.
 Coefficient of Restitution/Trampoline Effect: The
coefficient of restitution is a measure of the elasticity
of the collision between ball and bat. Elasticity is a
measure of how much bounce there is, or in other
words, how much of the kinetic energy of the
colliding objects before the collision remains as
kinetic energy of the objects after the collision.
 Ball Exit Speed Velocity- Maximum exit velocity of
a ball coming off of a bat after the point of contact. A
brand new bat must not exceed an exit speed of 97
miles per hour.

4.  Ha: The exit velocity of a baseball coming off of a
BESR certified bat will be higher than a ball exiting a
BBCOR certified bat!
 Ho: There will be no significant difference in the exit
velocity off of a BESR or BBCOR certified bat!

5.  Independent
 BESR Bats
 BBCOR Bats
 Dependent
 Exit velocity of a baseball coming off a BESR or
BBCOR certified bat using a standard stationary
hitting tee

6.  Participants
 8 MSU-Billings University Baseball Players
 College aged Freshman-Seniors
 18-24 year old males
 Randomly Assigned
 Trained Collegiate Baseball Athletes

7.  Stalker Radar Gun- Used to see velocity/speed of the
baseball
 5 Wilson A1001-Red Cushioned Cork Center:
Premium Leather (Brand New Pearls)
 ATEC Tee- Standardized and Stationary
 Batting Cage/Net- Located in Lower Gym: MSU-
Billings Campus
 8 Participants

9. Participant- Parallel to the tee and perpendicular to the
net.
http://www.bing.com/videos/watch/video/baseball-
hitting-instructional-videos-tee-
drill/6d2a55979e1869998a216d2a55979e1869998a21-
309014495480?q=baseball%20tee&FROM=LKVR5&GT1
=LKVR5&FORM=LKVR34

11.  Participants randomly selected. 8 total participants
 Tee placed in front of net
 Each participant hit 5 Pearls with each bat
 KEY/Instruction: Hit the ball as hard as possible
directly into the net and directly at the radar gun
 The exit velocity of the baseball was recorded after
each swing in miles per hour.

12.  True Experimental Design-Groups were randomly
formed, and all subjects were equivalent at the
beginning of the research.
 Randomized Groups
 R T O
 T-Test for Correlated Samples- Vassar Stats
 http://faculty.vassar.edu/lowry/VassarStats.html

13.  F Value= 2.15
 P Value=0.166999
 DF (Degree of Freedom) between groups=7
 DF 7 at the .05 level is=.6664
 16% Chance!
 SIGNIFICANT DIFFERENCE
 MUST REJECT NULL HYPOTHESIS

14.  History-Fatigue of Participants
 Health of each bat- Dents and overuse
 Health of Athletes- Rehab?
 Expectations of Athlete/Researcher

15.  No Significant Difference
 Accept Null Hypothesis
 Simulated Data