What is the median of the data 1, 5, 3, 7, 9, 2, 4, 7, 1?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 4
The median is the middle value after the data are arranged in order. For an odd number \(n\) of values it is the \(\frac{n+1}{2}\)th value.
In ascending order: 1, 1, 2, 3, 4, 5, 7, 7, 9
There are 9 values, so the median is the \(\frac{9+1}{2}=5\)th value
5th value \(=4\)
The median is 4.