<result> <column_name>bedtime_phone_minutes</column_name> <family>additive</family> <subtype>real_additive</subtype> <confidence>0.8</confidence> <requires_user_confirmation>false</requires_user_confirmation> <sum_meaningful>true</sum_meaningful> <signed>false</signed> <reducers> <primary_reducer>sum</primary_reducer> <valid_reducers>sum, min, max, mean, median, count, distribution</valid_reducers> <excluded_reducers>product (not a ratio), geomean (not a ratio)</excluded_reducers> <average_semantics>arithmetic_mean</average_semantics> </reducers> <inner_outer_measure> <inner_measure_reducer>sum</inner_measure_reducer> <outer_measure_reducer>sum</outer_measure_reducer> </inner_outer_measure> <multiplicative_partner_derivable>false</multiplicative_partner_derivable> <reasoning> The table is a DIMENSION with no sequence axis, so the prior strongly favors additive and rules out multiplicative. The column is a duration in minutes, strictly positive with a mean of 59 and a range of 1 to 180. It is centered far from 1.0, which is an extensive time quantity with no implicit denominator, so summing across volumes (total minutes) is meaningful. The name has no ratio tokens, and the log-symmetry gain is modest, so nothing suggests a multiplicative reading. Confidence is slightly reduced because the column is one value per entity, so a per-entity average is also a natural rollup. The bounded range of 1 to 180 is consistent with that, but it does not make the sum meaningless. </reasoning> <table_type_conflict>false</table_type_conflict> </result>