Question

Find the mode for the following data :
Class
0-20
20-40
40-60
60-80
80-100
100-120
120-140
140-160
160-180

Frequency
11
14
18
21
31
27
12
11
10

Answer 1

class mark = upper limit+lower limit/2
class Frequency
10 11
30 14
50 18
70 21
90 31
110 27
130 12
150 11
170 10
Therefore, 90 is the mode of the following data (since, it is repeating 31 times).