select sum(population) ,  avg(surfacearea) from country where continent  =  "north america" and surfacearea  >  3000
Give the total population and average surface area corresponding to countries in North America that have a surface area greater than 3000 .
select sum ( population ) , avg ( surfacearea ) from country where continent = "north america" and surfacearea > 3000
select sum ( population ) , avg ( surfacearea ) from country where continent = value and surfacearea > value
Give the total population and average surface area corresponding to countries in North America that have a surface area greater than 3000 .