2. A volleyball coach noted that players who practiced jumping during practice time seemed to be able to jump higher in the games. He wondered whether jumping practice increased vertical jump height more effectively than lower extremity weight training. To test this phenomenon, he proposed the null hypothesis, that no significant differences exist between players who practiced jumping, players who participate in lower extremity weight training, and players who do neither exercise. For 6 weeks prior to the start of the season, he randomly divided his team into three groups of 10 players each. Group one (control) practiced regularly without any special jumping or weight training. Group 2 (jumping) spent the last 20 minutes of each practice session in jumping exercises, and group 3 (weight training) spent the last 20 minutes of each practice session doing high-resistance leg presses. Following are the results (in inches) of a vertical jump test taken 2 days before the rst game. Control Weight training Jumping 23 26 33 2 l 25 32 25 28 36 26 3 l 29 3 l 34 27 Control Weight training lumping 27 35 34 32 29 35 34 2'7 37 25 28 35 2 1 25 28 a. What are the means and standard deviations for the three groups? b. What is the value of F? Is it significant? ls so, what is the p value? c. Did either of the experimental group means signicantly exceed the control group? (Use Tukey's HSD.) Which one(s)? d. Do you accept or reject the null hypothesis? Review the hint given in problem 1 above for help with setting up the database. The database in problem 2 will be similar to that in problem 1: three groups in column 1 designated by numbers 1, 2, or 3, and vertical jump scores in column 2