Question

The below distribution give the weight of 40 students in a class .find the media weight of the students

Answer 1

Answer:

Weight ( in kg ) Frequency Cumulative frequency

40−45 2 2

45−50 3 5

50−55 8 13

55−60 6 19

60−65 6 25

65−70 3 28

70−75 2 30

N=30

We have N=30 and

2

N

=15.

Median class =55−60, so l=55,f=6,cf=13 and h=60−55=5

Median=l+

f

2

N

−cf

×h

⇒ Median=55+

6

15−13

×5

⇒ Median=55+1.67=56.67kg