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 (p=0.54) . You know this means the time it took your patient to walk 20 feet unassisted was:

A) Significantly faster than the average patient on the unit
B) Significantly slower than the average patient on the unit
C) 2.3 times faster than the slowest patient on the unit
D) Is not significantly different from the mean time