Question

Discrete and continuous series
Variable
Frequency
0-5
2
5-10
5
10-15
7
15-20
13
20-25
21
25-30
16
30-35
8
35-40
3​

Answer 1

Answer:

ANSWER

Xi f c.f ∣Xi−M∣ fi×∣Xi−M∣

10 7 7 20 140

15 3 10 15 45

20 8 18 10 80

25 5 23 5 25

30 6 29 (Median Class) 0 0

35 8 37 5 40

40 4 41 10 40

45 9 50 15 135

∑fi∣Xi−M∣ =505

Rank of median =

2

N

th observation =25th

(

2

N

+1)th observation =26th

Median =

2

30+30

=30

Mean Deviation about Median =

N

1

∑fi∣Xi−M∣ =

50

505

Mean Deviation =10.1