In a study of 6-11 year old elementary school children, data shows a strong positive correlation between measures of physical coordination and math scores. For example, scores on arithmetic problems are strongly associated with the time it takes to run a 50-yard race, r = 0.83. Which of the following is the most appropriate conclusion given this finding? A. Arithmetic improves coordination.
B. To improve arithmetic scores the school should require students to get exercise, like running.
C. Age is a probably lurking variable in this study.