Consider two datasets A and B, each with 3 observations, such that both the datasets have the same median. Which of the following MUST be true?
1
Sum of the observations in A= Sum of the observations in B.
2
Median of the squares of the observations in A= Median of the squares of the observations in B
3
The median of the combined dataset = median of A+ median of B.
4
The median of the combined dataset = median of A.