1. What is the r value for the relationship between Hamstring strength index 60°/s and the Shuttle run test? Is this r value significant? Provide a rationale for your answer.
2. Consider r = 1.00 and r = -1.00. Which r value is stronger? Provide a rationale for your answer.
3. Describe the direction of the relationship between the Hamstring strength index 60°/s and the Shuttle run test.
4. Without using numbers, describe the relationship between the Hamstring strength index 120°/s and theTriple hop index.
5. Which variable has the weakest relationship with the Quadriceps strength index 120°/s? Provide a rationale for your answer.
6. Which of the following sets of variables has the strongest relationship?
a. Hamstring strength index 120°/s and the Hop index
b. Quadriceps strength index 60°/s and the Carioca test
c. Quadriceps strength index 120°/s and the Side step test
d. Quadriceps strength index 60°/s and the Triple hop index
TABLE. Pearson's Product-Moment Correlation between Strength Indices and Function after Surgery
|
|
n |
Quadriceps Strength
Index
60°/s
|
Hamstring Strength
Index
60°/s
|
Quadriceps Strength
Index
120°/s
|
Hamstring Strength
Index
20 °/s
|
|
Hop index
|
31
|
r= 0.655"
|
1 = 0.247
|
r= 0.744"
|
0.431*
|
|
Sig. (two tailed)
|
|
p= 0.000
|
p= 0.080
|
p= 0.000
|
p= 0.016
|
|
Triple hop index
|
31
|
r .., 0.619"
|
r = 0.342
|
0.742"
|
r= 0.420*
|
|
Sig. (two tailed)
|
|
p = 0.000
|
p= 0.060
|
p= 0.000
|
p= 0.019
|
|
Shuttle run test
|
31
|
r=-0.498"
|
r= -0.149
|
= -0.457"
|
r = -0.178
|
|
Sig. (two tailed)
|
|
p= 0.004
|
p= 0.424
|
pr 0.010
|
p= 0.338
|
|
Side step test
|
31
|
r , -0.528"
|
r, -0.124
|
-0.519"
|
r= 0.238*
|
|
Sig. (two tailed)
|
|
p= 0.002
|
p= 0.506
|
p= 0.003
|
p= 0.198
|
|
Carioca test
|
31
|
r= -0.474*
|
r= -0.047
|
r = -0.510"
|
r=0.267
|
|
Sig. (two tailed)
|
|
p= 0.000
|
p= 0.802
|
p= 0.003
|
p= 0.146
|
7. In Table, two r values are reported as r = -0.498 and r = -0.528. Describe each r value in words, indicating which would be more statistically significant, and provide a rationale for your answer.
8. Theresearchers stated that the study showed a positive, significant correlation between Quadriceps strength indices and pre- and postoperative functional stability. Considering the data presented in the Table 5, do you agree with their statement? Provide a rationale for your answer.
9. The researchers stated that no significant relationship could be described between Hamstring strength indices 60°/s and functional stability. Given the data in Table 5, explain why not.
10. Consider the relationship reported for the Quadriceps strength index 120°/s and the Hop index
(r = 0.744**, p = 0.000). What do these r and p values indicate related to statistical significance and clinical importance?