Question

calculate mean using short-cut method. {class 11 statistics for economics.}
marks No.of students
0-4 4
4-8 8
8-12 2
12-16 1

Answer 1

Answer:

mean =6

Explanation:

0-4. 2. 4. 8.

4-8. 6. 8. 48

8-12. 10. 2. 20

12-16. 14. 1. 14

15. 90

mean=90/15=6