<result> <column_name>total_sleep_hours</column_name> <family>additive</family> <subtype>real_additive</subtype> <confidence>0.72</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 table with no sequence axis, so multiplicative is implausible, and a physical quantity leans real_additive. The name tokens "total" and "hours" (a duration) point to an extensive quantity. The data agree: strictly positive, mean about 6.3 and range 3.2-9.8, nowhere near 1.0, and the log-symmetry gain is negative. The bounded, level-like range is mildly consistent with an intensive per-night average, which is why confidence is moderate. Summing sleep hours across entities is still meaningful as person-hours, and mean remains a valid reducer.</reasoning> <table_type_conflict>false</table_type_conflict> </result>