mm43 wrote regarding redundant ADR airspeed data used by PRIMs :
the mean of the polled values - be it from whatever number of sources
Respectfully disagreeing here, the information I have says :
When THREE sources are available,
median value is used. That is, for 3 values, it is always possible to order them in such a fashion :
lowest <= median <= highest
When TWO sources are available,
mean value is used. That is
mean = (valueA + valueB) / 2.
An expression seems to be used that covers both cases, and that is
voted value, which could be either mean or median, depending on the number of available sources.