The noise band

How much those sets normally differ anyway.

The part

What it is

Measured from the period before the test. A difference inside this band is not a finding regardless of how convenient it is.

This is the step that separates a holdout from an anecdote about two regions.

The smallest level

The attributes it carries

Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.

Normal variation
How much the sets differ without any intervention.
Measure shared type
Baseline period
What the band was measured over.
Period shared type
Exceeded
Whether the test difference is outside the band.
Choice shared type