Research & Statistics
Z Score Calculator
The Z score tells you how many standard deviations a data point is from the mean. It is widely used in physiotherapy research for standardizing measurements and comparing data across different scales.
Formula
Z = (X - Mean) / Standard Deviation
Normal Range
Z=0: At mean | Z=±1: 68% of data | Z=±2: 95% of data | Z=±3: 99.7% of data
Clinical Use
Research data analysis, normative comparisons, outcome measure interpretation.
Use the Calculator
Enter patient values and get instant AI-powered clinical interpretation.