https://pizza.rs/tags/t_test/Recent content in T_test on INFINI PizzaHugoenhttps://pizza.rs/docs/references/aggregation/metric/t-test/Mon, 01 Jan 0001 00:00:00 +0000https://pizza.rs/docs/references/aggregation/metric/t-test/<h1 id="t-test-aggregation"> T-test aggregation <a class="anchor" href="#t-test-aggregation">#</a> </h1> <p>A single-value metrics aggregation for a Student&rsquo;s t-test over two numeric fields. Positive values mean <code>a</code> tends to be larger than <code>b</code>.</p> <h2 id="how-it-works"> How it works <a class="anchor" href="#how-it-works">#</a> </h2> <p>The engine collects every value of <code>a.field</code> and every value of <code>b.field</code> across the bucket&rsquo;s documents — the two samples grow independently, so a document missing one field still contributes to the other sample — and computes Welch&rsquo;s two-sample t-statistic:</p>