Click and drag to change the height of the bars. The horizontal lines are averages. The black line is the arithmetic mean. The red line is the median. The green line is the mode (there may be multiple). When do the horizontal lines overlap? When are they furthest apart?
In this remix, I have added mode, which is the value with the highest number of occurrences. Note that if there may be multiple modes. Learn more here: https://en.wikipedia.org/wiki/Average https://en.wikipedia.org/wiki/Arithmetic_mean https://en.wikipedia.org/wiki/Median https://en.wikipedia.org/wiki/Mode_(statistics)