Directions: Read the following group of statements and choose the best inference which can be deduced from the argument given below.
In a comprehensive study, 250 randomly chosen schools from a wide range of socioeconomic backgrounds were compared throughout Japan. It was discovered that smaller schools typically have the higher average student grades; the schools in the bottom 5% of terms of size are also in the top 5% for student achievement. Consequently, if we want to improve student performance, we ought to support smaller schools.
1
Smaller schools employ effective teaching strategies.
2
Compared to large schools, small schools have a better student-teacher ratio.
3
Student achievement and school size are correlated.
4
The fact that student achievement is higher in smaller schools is a coincidence.
5
None of the above