Which observation in the following data has the maximum frequency?
5, 5, 2, 4, 3, 2, 5, 2, 2, 4, 2

Given data is: 5, 5, 2, 4, 3, 2, 5, 2, 2, 4, 2

In the above data,

5 occurs 3 times.

2 occurs 5 times.

3 occurs 1 time.

4 occurs 2 times.

Hence, 2 has a maximum frequency i.e., 5.