EXERCISE-1
1Q. In a survey of 30 families in a village, the number of children per family was recorded and following data
obtained.
652831787024672
523423553434463
Represent the data in the form of a discrete frequency distribution.
Solution:
Step 1:- Smallest value is ‘0’
Largest value is ‘8’
Step 2:- have to prepare tally bar table
1. No. of children’s
2. Tally bar
3. Frequency
No. of children’s Tally bar frequency
0 | 1
1 | 1
2 |||| 5
3 ||||| 6
4 |||| 5
5 |||| 4
6 ||| 3
7 ||| 3
8 || 2
NOTE: in tally bar we are take no. of values which are repeated like ‘1’ is repeating only 1 time so we are marking as |.
And in ‘2’ the no. 2 is repeating 5 times so we are marking 4 times in tally bar column. If there is a no. which is
repeating 5 times then by the 5th time cut the tally’s but in frequency column count as 5 as in like above table.
2Q. The class of 2004 of Osmania University had 30 students who scored the following letter grades.
ABDCCBDCBCBCBAB
CBADDCBBDDABCCB
Represent the data in the form of a discrete frequency distribution.
Solution: -
No. of Tally bar Frequency
students
A |||| 4
B |||| |||| | 11
C |||| |||| 9
D |||| | 6
3Q. Following are the marks secured by 60 students. Arrange the data in a frequency table by ‘Exclusive Method’.
56 71 18 31 56 40 81 64 59 49
42 12 67 07 39 76 48 07 80 84
34 58 61 28 45 00 63 61 11 81
12 24 75 64 68 43 58 79 36 83
09 64 38 30 32 60 27 18 54 63
37 58 83 41 47 38 83 45 56 28
Continuation…
1Q. In a survey of 30 families in a village, the number of children per family was recorded and following data
obtained.
652831787024672
523423553434463
Represent the data in the form of a discrete frequency distribution.
Solution:
Step 1:- Smallest value is ‘0’
Largest value is ‘8’
Step 2:- have to prepare tally bar table
1. No. of children’s
2. Tally bar
3. Frequency
No. of children’s Tally bar frequency
0 | 1
1 | 1
2 |||| 5
3 ||||| 6
4 |||| 5
5 |||| 4
6 ||| 3
7 ||| 3
8 || 2
NOTE: in tally bar we are take no. of values which are repeated like ‘1’ is repeating only 1 time so we are marking as |.
And in ‘2’ the no. 2 is repeating 5 times so we are marking 4 times in tally bar column. If there is a no. which is
repeating 5 times then by the 5th time cut the tally’s but in frequency column count as 5 as in like above table.
2Q. The class of 2004 of Osmania University had 30 students who scored the following letter grades.
ABDCCBDCBCBCBAB
CBADDCBBDDABCCB
Represent the data in the form of a discrete frequency distribution.
Solution: -
No. of Tally bar Frequency
students
A |||| 4
B |||| |||| | 11
C |||| |||| 9
D |||| | 6
3Q. Following are the marks secured by 60 students. Arrange the data in a frequency table by ‘Exclusive Method’.
56 71 18 31 56 40 81 64 59 49
42 12 67 07 39 76 48 07 80 84
34 58 61 28 45 00 63 61 11 81
12 24 75 64 68 43 58 79 36 83
09 64 38 30 32 60 27 18 54 63
37 58 83 41 47 38 83 45 56 28
Continuation…
