Yes. It is reasonable to say that 24 more families chose Hawaii over Florida.
To say that 24 more families chose Hawaii over Florida implies that the number of families that chose Hawaii is greater than the families that chose Florida by 24.
For example, if 30 families chose Florida, then the number of families that chose Hawaii will be 54 (30 + 24).
Thus, it is very reasonable to conclude from the survey that 24 more families chose Hawaii over Florida.
