llister, et al. (2012) compared varsity football and hockey players with varsity athletes from noncontact sports to determine whether exposure to d impacts during one season have an effect on cognitive performance. In the study, tests of new learning performance were significantly poorer fo contact sport athletes compared to the noncontact sport athletes. The following table presents data similar to the results obtained in the study. Noncontact Athletes Contact Athletes 10 7

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter1: Functions
Section1.2: The Least Square Line
Problem 5E
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Be sure to include r² =     

Do: Chapter 10 End-of-Chapter Problems
O Fail to reject the null hypothesis; there is a significant difference.
O Reject the null hypothesis; there is no significant difference.
O Reject the null hypothesis; there is a significant difference.
O Fail to reject the null hypothesis; there is no significant difference.
t Distribution
Degrees of Freedom = 21
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
Compute the value of r2 (percentage of variance accounted for) for these data.
Transcribed Image Text:Do: Chapter 10 End-of-Chapter Problems O Fail to reject the null hypothesis; there is a significant difference. O Reject the null hypothesis; there is no significant difference. O Reject the null hypothesis; there is a significant difference. O Fail to reject the null hypothesis; there is no significant difference. t Distribution Degrees of Freedom = 21 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 Compute the value of r2 (percentage of variance accounted for) for these data.
Do: Chapter 10 End-of-Chapter Problems
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 performance. In the study, tests of new learning performance were significantly poorer for
the contact sport athletes compared to the noncontact sport athletes. The following table presents data similar to the results obtained in the study.
Noncontact Athletes
Contact Athletes
10
8
4
9.
3
13
7
10
12
2
Are the neurological test scores significantly lower for the contact athletes than for the noncontact athletes in the control group? Use a one-tailed test
with a = .05.
t-critical
t
Transcribed Image Text:Do: Chapter 10 End-of-Chapter Problems 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 performance. In the study, tests of new learning performance were significantly poorer for the contact sport athletes compared to the noncontact sport athletes. The following table presents data similar to the results obtained in the study. Noncontact Athletes Contact Athletes 10 8 4 9. 3 13 7 10 12 2 Are the neurological test scores significantly lower for the contact athletes than for the noncontact athletes in the control group? Use a one-tailed test with a = .05. t-critical t
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