The actual area is 44,825 mi², and the actual population density of Ohio is 282.3 people per square mile. I can't answer the estimate part because I don't know what your estimate was. But you can say my estimate was greater than the actual number or less than the actual number. And you can say your estimate was greater/less than the actual population density because I didn't know so many people were in each square mile because a square mile isn't that large.
