From the archive
Wednesday, 16 September 2026
MEDIAN finds the middle of a sorted list rather than folding every value into a total, so a single outlier can't drag it around the way it drags AVERAGE.
You handle compensation analysis in HR at a marketing agency, checking pay equity ahead of a scheduled review. Six base salaries are listed below: five marketing specialists and the department director. In C8, report the median base salary across all six people — the figure HR will actually quote, since the director's salary sits well above the specialists' and would drag a plain average upward. In C9, work out that plain average for comparison, so the gap between the two is visible. In C10, work out the standard deviation of just the five specialists' salaries, to show how tightly clustered a typical specialist's pay actually is.
A new exercise every morning, plus every day that came before it — a back catalogue that grows by one a day, whether or not you were here for it.
The last 14 days. Today's challenge is free while your streak is alive; Pro opens every past day too.