Football, Brain Size, and Cognitive Scores examined the a below gives two scatte
ID: 3302866 • Letter: F
Question
Football, Brain Size, and Cognitive Scores examined the a below gives two scatterplots, Both have number of years playing football as the explanatory variable while Graph (1) has hippocampal volume as the response variable and between playing football, brain size as measured by left hippocampal volume (in ul), and percentile on a cognitive reaction test. The figure Graph (2) 40 10 1 14 6 18 1012141610 Years of Fot singh R, et al., Relationship of Collegiate Football Experience and Concussion with Hippocampal volume and Cognitive Outcomes" JAMA, 311018) from information in the paper. 9/20/2017Explanation / Answer
a)
-0.465 - left hippocampal volume { more correlated as data are compact as compared to reaction time}
-0.366 - reaction time
b)
option A) is correct
when r is negative , when one variable increases other decreases