A tercile is one of the three groups of equal probability or approximately equal size obtained by dividing a distribution at its two tertiles. The groups are commonly called the lower, middle, and upper terciles.
Tercile
See also
Quantile, TertileExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Tercile." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Tercile.html