In starting to wrap up this year's work, today we revisited measures of center. These include the mean, median, and mode(s) of a dataset. Jared is very familiar with this topic, so we were able to proceed quickly through the material. We also looked at producing a 'box-and-whisker' plot for a dataset from its quartiles. Quartiles are derived from a dataset by initially identifying the median, and then finding the medians for the resulting two halves. The range covered by the medians together with the maximum and minimum values of the dataset form the box-and-whisker plot, which is one useful way of visualizing the data.