GRE Confusing Words Practice
quantile / ˈkwɑn taɪl /quartile / ˈkwɔr taɪl /
1
The analyst calculated the 0.90 ____ of the response times, the cutoff corresponding to the 90th percentile rather than a division into quarters.
2
The first ____, Q1, is the 25th percentile, the first of the three cut points used to divide ordered data into four groups.
Note
Both quantiles and quartiles are values that divide sorted data into proportions.
For example, consider the sorted scores:
[60, 71, 79, 82, 85, 87, 90, 100]
- The 0.9 quantile (90th percentile) is a value below which approximately 90% of the data fall, with approximately 10% above it.
- The first quartile (Q1, or 0.25 quantile) is a value below which approximately 25% of the data fall, with approximately 75% above it.
