Function exactData

src/compute-engine/library/statistics.ts:681–688

* If every value flattened from `ops` is an exact, finite real number, return * them as boxed expressions; otherwise `null` (caller falls back to the float * path).

(ops: ReadonlyArray<Expression>)

          const vals = exactData(xs);
          if (vals) return exactMedianOf(engine, sortExact(vals));
        }
        return engine.number(
          bignumPreferred(engine)
            ? bigMedian(bigScalarsOf(xs))
            : median(scalarsOf(xs))
        );
      },
    },

    Variance: {
      description: 'Sample variance of a collection of numbers.',