# HLT-362V Week 5 Workbook Exercises 23 and 24 + Bonus Question

HLT-362V Week 5 Workbook Exercises 23 and 24 + Bonus Question
Applied Statistics for Health Care Professionals - Discovering Relationships and Building Models
Grand Canyon University

Complete Exercise 23 and 24 in Statistics for Health Care Research: A Practical Workbook.

In order to receive full credit on calculated answers, please show your work. (Use Word's equation editor, etc., and/or provides a short written description as to how you obtained the final result.) Exercise 24 includes 10 questions and a Bonus question. Answer all questions including the Bonus question.

EX # 23 Questions

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

2. Consider r =1.00 and r =–1.00. Which 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 the Triple 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

7. In Table 5, 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. The researchers 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?

EX#24  Questions

1. What is the value listed for the relationship between variables 4 and 9?

2. Describe the correlation r =-0.32** using words. Is this a statistically significant correlation? Provide a rationale for your answer.

3. Calculate the percentage of variance explained for r =0.53. Is this correlation clinically important? Provide a rationale for your answer

4. According to Table 2, r =0.15 is listed as the correlation between which two items? Describe this relationship

5. Calculate the percentage of variance explained for r =0.15. Describe the clinical
importance of this relationship.

6. Which two variables in Table 2 have the weakest correlation, or r value? Which relationship is the closest to this r value? Provide a rationale for your answer

7. Is the correlation between LOT-R Total scores and Avoidance-Distraction coping
style statistically significant? Is this relationship relevant to practice? Provide rationales for your answers

8. Is the correlation between variables 9 and 4 significant? Is this correlation relevant to practice? Provide a rationale for your answer

9. Consider two values, r =0.08 and r =–0.58. Describe them in relationship to each other. Describe the clinical importance of both r values

10. Examine the Pearson r values for LOT-R Total, which measured Optimism with the Task and Emotion Coping Styles. What do these results indicate? How might you use