What influences Class VIII marks?

Impact of “Age” in Maths %

89,417

+3.1%
11- years 12 years 13 years 14 years 15 years 16+ years

“Age” can improve Maths % by +3.1%. “12 years” is best — students score 32.8%. “16+ years” is worst — students score 29.7%.

But, 13 years is most common.