>"at least half of all people are at or below median" Take the median of 1 2 5 5 5 5 8 9 11 23 58 46 48 37 28 67 39 Much less than half of the numbers are

>"at least half of all people are at or below median" Take the median of 1 2 5 5 5 5 8 9 11 23 58 46 48 37 28 67 39 Much less than half of the numbers are at or below the the median of 5. (also median would be a bad way to get an average for this set.)