Z-Scores and Percentiles
11th Grade · Math · 45 min
Lesson Preview
Learning Objective
I can calculate z-scores and use them to determine percentiles in a normal distribution.
- 1
A z-score tells you how many standard deviations a data point is from the mean of its distribution.
- 2
To calculate a z-score, you subtract the mean from the raw score and then divide by the standard deviation.
- 3
Percentiles indicate the percentage of values in a distribution that fall below a specific score.
