Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
Values that divide a dataset into four equal parts; the first quartile (Q1) marks the 25th percentile and the third quartile (Q3) marks the 75th percentile.
AP course connection
Topic 1.7: 1.7 Summary Statistics for a Quantitative Variable