ANOVA LAB 1. A volleyball coach noted that players who practiced jumping during
ID: 3259524 • Letter: A
Question
ANOVA LAB
1. A volleyball coach noted that players who practiced jumping during practice time seemed to be able to jump higher in the games. He wondered if jumping practice was more or less effective than lower extremity weight training to increase vertical jump height.
For six weeks prior to the start of the season, he randomly divided his team into three groups of 10 players each. Group 1 (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. The following are the results of the vertical jump test (in inches) taken two days before the first game.
Control
Weight Training
Jumping
23
26
33
21
25
32
25
28
36
26
31
29
31
34
27
27
35
34
32
29
35
34
27
37
25
28
35
21
25
28
The researcher proposes the following two hypotheses that they are interested in testing:
1. Are the Weight Training and Jumping practices more effective than the Control?
2. Are there differences between the Weight Training and Jumping practices?
For each, run a 5-step hypothesis test. Include your output with the ANOVA Summary Table.
Write up your conclusions in paragraph form and follow APA format.
Control
Weight Training
Jumping
23
26
33
21
25
32
25
28
36
26
31
29
31
34
27
27
35
34
32
29
35
34
27
37
25
28
35
21
25
28
Explanation / Answer
1)
Since p-value is 0.005669 < 0.05
we conclude that the Weight Training and Jumping practices more effective than the Control
2) Result of t-test Using Excel
since p-value for one-tail is 0.006892492 < .05
we reject the null and conclude that there are differences between the Weight Training and Jumping practices
In fact Jumping is more effective
Anova: Single Factor SUMMARY Groups Count Sum Average Variance Control 10 265 26.5 20.5 Weight 10 288 28.8 12.4 Jump 10 326 32.6 12.26666667 ANOVA Source of Variation SS df MS F P-value F crit Between Groups 189.8 2 94.9 6.303321033 0.005669 3.354130829 Within Groups 406.5 27 15.05556 Total 596.3 29Related Questions
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