One Way to Measure the Ability to Find One's Way

Multiple Choice

One way to measure the ability to find one's way in an environment is to use the Sense of Direction test scale.The scale ranges from 1 (poor) to 50 (good) .In a sample of college students,including yourself,the mean rating of sense of direction is 30,with a standard deviation of 10.If your score was 20,what is your z-score?

A) 0.57
B) 1.0
C) +1.5
D) 3.0