CREATE TABLE "iowa_counties_by_per_capita_income" (
  "county" text,
  "per_capita_income" text,
  "median_household_income" text,
  "median_family_income" text,
  "population" real,
  "number_of_households" real
);

Question: How many households have a Median household income of $43,889?
SQL: SELECT AVG("number_of_households") FROM "iowa_counties_by_per_capita_income" WHERE "median_household_income"='$43,889';

Question: Which Population has a Median family income of $53,946?
SQL: SELECT MAX("population") FROM "iowa_counties_by_per_capita_income" WHERE "median_family_income"='$53,946';