Question

Last year, Mr. Smith's biology class averaged 73 on their first test. This year, his new class averaged 87 on the same

Answer 1

E. No, there may be other differences between the two years besides the grades.

This is because every kid is different and Mr. Smith might have just gotten a better group of kids the second year. This is just one factor of many viable options.

May I have brainliest please? :)