Since I have an even number of numbers, the middle 2 numbers are going to help define my median because there's no one middle number. I might say this number right over here, this 4, but notice there's 1, 2, 3, 4, 5, 6, 7 above it, and there's only 1, 2, 3, 4, 5, 6 below it. The same thing would have been true for this 5. So this 4 and 5, the middle is actually in between these 2. So when you have an even number of numbers like this, you take the middle 2 numbers, this 4 and this 5, and you take the mean of the 2. So the mean of 4 and 5 is going to be 4 and 1 half. So that's going to be the median of our entire data set, 4 and 1 half.