## Study on Cognitive Performance in Athletes### OverviewMcAllister et al. (2012) conducted a study comparing varsity football and hockey players, classified as contact athletes, with varsity athletes from noncontact sports. The purpose was to assess whether exposure to head impacts during one season affects cognitive performance.### Study FindingsTests of new learning performance showed that contact sport athletes performed significantly poorer compared to noncontact sport athletes. The table below presents data akin to the results obtained in the study.### Data Table| Noncontact Athletes | Contact Athletes ||---------------------|------------------|| 10 | 7 || 8 | 4 || 7 | 9 || 9 | 3 || 13 | 7 || 7 | 6 || 6 | 10 || 12 | 2 |### Questions for Analysis**a.** Are the test scores significantly lower for the contact sport athletes than for the noncontact athletes? Use a one-tailed test with \(\alpha = .05\).**b.** Compute the value of \(r^2\) (percentage of variance accounted for) for these data.

Given: Noncontact Athletes Contact Athletes 10 7 8 4 7 9 9 3 13 7 7 6 6 10 12 2

McAllister et al. (2012) compared varsity football and hockey players with varsity athletes from noncontact sports to determine whether exposure to head impacts during one season have an effect on cognitive perfor- mance. In the study, tests of new learning performance were significantly poorer for the contact sport athletes compared to the noncontact sport athletes. The follow- ing table presents data similar to the results obtained in the study. Noncontact Athletes Contact Athletes 10 7 8 4 9. 9. 3 13 7 7 6. 10 12 a. Are the test scores significantly lower for the con- tact sport athletes than for the noncontact athletes? Use a one-tailed test with a – .05. b. Compute the value of r (percentage of variance accounted for) for these data.

McAllister et al. (2012) compared varsity football and hockey players with varsity athletes from noncontact sports to determine whether exposure to head impacts during one season have an effect on cognitive perfor- mance. In the study, tests of new learning performance were significantly poorer for the contact sport athletes compared to the noncontact sport athletes. The follow- ing table presents data similar to the results obtained in the study. Noncontact Athletes Contact Athletes 10 7 8 4 9. 9. 3 13 7 7 6. 10 12 a. Are the test scores significantly lower for the con- tact sport athletes than for the noncontact athletes? Use a one-tailed test with a – .05. b. Compute the value of r (percentage of variance accounted for) for these data.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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