A Large Group of Inductees Was Given a Mechanical Aptitude

Multiple Choice

A large group of inductees was given a mechanical aptitude and a finger dexterity test. The arithmetic mean score on the mechanical aptitude test was 200, with a standard deviation of 10. The mean and standard deviation for the finger dexterity test were 30 and 6 respectively. What is the relative dispersion in the two groups?

A) Mechanical 5 percent, finger 20 percent
B) Mechanical 20 percent, finger 10 percent
C) Mechanical 500 percent, finger 200 percent
D) Mechanical 50 percent, finger 200 percent