1) Compute 3rd quartile, 6th DECILE, 70th percentile.
28, 17, 12, 25, 26, 19, 13, 27, 21,16. 26.5, 23, 25.5
2) Compute median, QUARTILES
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22. 12, 6, 18
3) Compute QUARTILES, 3rd, 6th, 8th DECILE.
14, 7, 13, 12, 13, 17, 8, 10, 6, 15, 18, 21, 20. 9, 17.5, 11, 14.5, 19
4) Find 7th DECILE, 33rd percentile
18, 20, 9, 15, 21, 26, 14, 13, 27, 22, 16, 28. 24, 15.5
5) Find out the median, Quartile:
Age under No. of persons
10 15
20 32
30 51
40 78
50 97
60 109 54.5, 17.2, 41.97
6) Find the median, first quartiles, 3rd DECILE for the following:
Weekly income (₹) No.of workers
58 2
59 3
60 6
61 15
62 10
63 5
64 4
65 3
66 2 61,61,61
7) Find the median, 3rd quartile, 5th DECILE, 65th Percentile.
Value of the item frequency
1 25
2 30
3 38
4 45
5 46
6 58
7 32
8 34
9 25
10 22 5, 7, 5, 6
8) Find the median, Quartiles, 6th decile, 80th percentile of :::
Size of shoes no of shoes
4.5 4
5 8
5.5 12
6 15
6.5 20
7 35
7.5 50
8 40
8.5 20
9 15
9.5 24
10 12
10.5 5
11 3. 7.5, 7, 8.5, 8, 9
9) Find QUARTILES, 6th DECILE, 45th percentile of:
X f
18 15
19 18
20 25
21 27
22 40
23 25
24 19
25 16
26 8
27 7 20, 24, 22, 22
10) Obtain the value of median, Quartiles, from following data::
Weight (in kg) No.of persons
50-60 3
60-70 5
70-80 9
80-90 12
90-100 5
100-110 4
110-120 2 82, 71.7, 91.5
11) Determine the median and Quartiles of following data:
Marks No.of.students
0- 5 7
5-10 10
10-15 20
15-20 13
20-25 17
25-30 10
30-35. 14
35-40 9 20, 12.5, 27.5
12) Find median, the lower quartile, the upper quartile.
Class Frequency
01 - 10 7
11 - 20 15
21 - 30 32
31 - 40 45
41 - 50 60
51 - 60 52
61 - 70 38
71 - 80 30
81 - 90 20
91 - 100 11 50.3, 36.2, 67.7
13) Find lower quartile, upper quartile, 9th DECILE, 4th Percentile, 40th Percentile.
Duration (in sec) No. Of cells
0 -30 25
30-60 75
60-90 50
90-120 25
120-150 150
150-180 50
180-210 25
60, 145, 171, 19,2, 102
14) Find the median, 3rd quartile, 7th DECILE, 70th Percentile.
Marks No of students
00-10 3
10-20 10
20-30 17
30-40 7
40-50 6
50-60 4
60-70 2
70-80 1 49.5, 40.83, 37.14, 37.14, 37.14
15) Find out Quartiles, 1st decile.
Size of item f
00-10 2
10-20 18
20-30 30
30-40 45
40-50 35
50-60 20
60-70 6
70-80 3 26.58, 46.93, 17.7
16) Calculate the median, 3rd decile, 20th percentile of:
X F
0-5 7
5-10 18
10-15 25
15-20 30
20-25 20 15, 11, 8.6
17) Find the interquatile range, Quartile deviation, coefficient of Quartile deviation for following:
Age in years No of members
20 3
30 61
40 132
50 153
60 140
70 51
80 3 20,10, 0.2
18) Find the interquatile range, semi-interquartile range, coefficient of Quartile deviation of following:
Marks no of students
10-20. 60
20-30 45
30-40 120
40-50 25
50-60 90
60-70 80
70-80 120
80-90 60 38.75, 19.375, 0.365
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