Question

The mark obtained by 20 students in mathematics in the examination are given below.

group the data into the class interval of length 10 and construct a frequency distribution.

table with tally marks

27, 38,25,18,9,24, 48, 15,27,35

23,45,32,16,26,39,20,33,40,37

Answer 1

Explanation:

class interval

1. 9-19
2. 20-29
3. 30-39
4. 40-49

Frequency

1. 5
2. 7
3. 6
4. 2

tally

1. IIIII
2. IIIII II
3. IIIII I
4. II

Note: the fifth tally marks crosses the first 4 marks