aggregation function

[alinaciuysal]

for each incomingDataType:

• there should be a dropdown in UI (for now it's average & hard-coded in the backend)

for nominal case, neither min/max nor average can be applied. the only applicable scale is the "most frequent"

research should be done about summarization (aggregation) statistics

[alinaciuysal]

for each scale & incoming data type, try to come up with proper use (show) case

[alinaciuysal]

implemented here