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All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the students. Which of the following statistical measures will not change even after the grace marks were given ? (1) median (2) mode (3) variance (4) mean

All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the students. Which of the following statistical measures will not change even after the grace marks were given ? (1) median (2) mode (3) variance (4) mean

Grade:upto college level

1 Answers

Swetha
39 Points
10 years ago
variance will not change. because variance is proportional to (x - mean). x is marks of a student. now if every student`s marks are increased by 10, mean also increases by 10. so variance remains constant

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