The following data give the number of boys of a particular age in a class of 40 students. Age (in years) 15 16 17 18 19 20 Frequency (f 1 ) 3 8 9 11 6 3 Calculate the mean age of the students.

Question

Philoid · Accepted Answer

Let’s draw the table and calculate the relative value of variables∑xi×fi

Age (in years) (xi)	Frequency (f_i)	(x_i×f_i)
15	3	45
16	8	128
17	9	153
18	11	198
19	6	114
20	3	60
	∑f_i = 40	∑x_i×f_i = 698

By putting the formula of mean we get;

Mean =

= 17.45 years

So the mean age of the students will be 17.45years.

The following data give the number of boys of a particular age in a class of 40 students.Age (in years)151617181920Frequency (f1)3891163Calculate the mean age of the students.

The following data give the number of boys of a particular age in a class of 40 students.

Age (in years)

15

16

17

18

19

20

Frequency (f₁)

3

8

9

11

6

3

Calculate the mean age of the students.