What is the difference between the median and the mean of the dataset? Write your answer in decimal form.
{22, 26, 29, 27, 24, 22, 23, 20, 19, 28, 26, 18, 30, 31, 22, 23, 26, 29, 24, 21}
{22, 26, 29, 27, 24, 22, 23, 20, 19, 28, 26, 18, 30, 31, 22, 23, 26, 29, 24, 21}