4. In a study of absolute errors in active versus passive arm positioning, an investigator collected data (in centimeters) on 20 college-age subjects (from the motor learning laboratory, California State University Northridge, courtesy of Tami Abourezk). Does a significant difference exist in the errors in arm positioning made by the active group (N, =10) compared with those made by the passive group (N2 =10)? Subject Active Subject Passive 1 2.65 11 3.30 2 2.42 12 2.00