Summary statistics of a data set – dragging data points

MathematicsStatisticsAges 15–16

A data sample is shown as a dot plot on a number line. Drag any point (or click 'Random') and watch the mean, median, quartiles Q₁, Q₂, Q₃, mode, range, interquartile range, variance and standard deviation update instantly. A box plot is drawn below, with outliers (outside [Q₁ − 1.5·IQR; Q₃ + 1.5·IQR]) marked with ×; drag one point far away to see the mean shift a lot while the median barely changes.