Table: nh_income_data
Columns: county
per_capita_income
median_household_income
median_family_income
population
number_of_households

Question: When the county is Carroll what is the lowest population?
SQL: SELECT MIN("population") FROM nh_income_data WHERE "county" = 'carroll'

Question: When the Per capita income is $29,194, what is the average population?
SQL: SELECT AVG("population") FROM nh_income_data WHERE "per_capita_income" = '$29,194'