20.1.7  Quantiles

Similar to quartiles, a quantile of a list is the number q such that a given fraction of the list numbers fall at or below q. The first quartile, for example, is the quantile with the fraction 0.25.

The quantile command finds quantiles.

• quantile takes two mandatory arguments and one optional argument:
  • L, a list of numbers.
  • Optionally, W, a list of weights.
  • p, a number between 0 and 1.
  quantile(L,p) returns the pth quantile of L.

Examples