Question

Sujan collected data on the ages of 11 young People

who visited Bharaztpar.

Age. l frequency
1-5. l 3
6-10. l 3
11-15. l 3
16-20. I 3

calculate ah estimate for the mean age of visitors
Note: Round your answer zo the nearest whole number​

Answer 1

10.5

Explanation:

Given the data:

Age. l frequency

1-5. l 3

6-10. l 3

11-15. l 3

16-20. I 3

Mean :

Σfx / Σf

Obtain the midpoint (x) = (upper + lower boundary) / 2

Hence, midpoint x :

Age. l frequency | x

1-5. l 3 | 3

6-10. l 3 | 8

11-15. l 3 | 13

16-20. I 3 | 18

Σfx = (3*3) + (3*8) + (3*13) + (3*18) = 126

Σf = (3 + 3 + 3 + 3) = 12

Mean = Σfx / Σf = 126 / 12 = 10.5