T-test aggregation #

A single-value metrics aggregation for a paired or two-sample Student’s t-test over two numeric fields. Positive values mean a tends to be larger than b.

Simplified engine note: the paired form (type: paired) is computed over the per-document column values; homoscedastic / heteroscedastic fall back to the same paired evaluation.

Example #

Do sale prices differ from quantities in a systematic way?

Parameters for t_test #

• a
  (Required, object) field — the first numeric field.
• b
  (Required, object) field — the second numeric field.
• type
  (Optional, string, default: paired) paired, homoscedastic or heteroscedastic.