Compare sessions with different broadcast lengths fairly

Sessions of different lengths need both totals and time-based context, otherwise a longer broadcast may look better simply because it ran longer.

A practical procedure

1. Record usable broadcast minutes separately from planned duration and downtime.

2. Compare relevant counts per usable minute while retaining the raw totals.

3. Note differences in products, audience exposure and interruptions before interpreting the comparison.

Worked example: a fictional session

A fictional 20-minute session answers 40 questions and a 40-minute session answers 60: their rates are 2 and 1.5 answers per minute.

Check the limits

Equalising time alone does not make different audiences or question difficulty equivalent.