# Exercise 23 and 24 Gcu

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Exercise: 23 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 The relationship between Hamstring strength index 60 degree/s and the Shuttle run test is a weak negative relationship due to r = −0.149 listed in Table 5 since r 0.01. 2. Consider r =1.00 and r =–1.00. Which r value is stronger? Provide a rationale for your answer The r values of +1.00 and –1.00 both indicate the strongest possible relationships among variables . Positive (+) 1.00 is the strongest or perfect positive relationship and indicates that variables change together, either increasing or decreasing simultaneously. Negative (–) 1.00 is the strongest or perfect negative relationship and indicates that variables change in opposite directions: as one variable increases another variable decreases. 3. Describe the direction of the relationship between the Hamstring strength index 60/s and the Shuttle run test. The relationship between Hamstring strength index 60 degree/s and the Shuttle run test is a negative relationship due to r moves away from zero in negative direction and r = −0.149, the strength of this negative relationships would be weak with r -0.5 r=-0.528**, is more significant since p =0.002< 0.01, where r = −0.498** is significant at p =0.004< 0.01. The smaller the p-value in a test of hypothesis the more significant the results are. 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. Yes Functional stability was determined by performance during five functional stability tests that included the shuttle run, side step, carioca,