Patients on Your Unit Complete a Functional Mobility Test

Patients on your unit complete a functional mobility test. The test determines how many seconds it takes to walk 20 feet unassisted. Your patient's speed is reported as a Z score of 2.3. Her roommate's speed is reported as a Z score of 1.8. You would expect your patient to walk 20 feet unassisted:

A) Faster than her roommate
B) Slower than her roommate
C) 2.3 times faster than the slowest patient on the unit
D) Unable to determine