under the "Medians" section: "In the case of the exemplar data sets, Data Sets A and B have median values of 4, and Data Set C has a median value of 1." I did

under the "Medians" section: "In the case of the exemplar data sets, Data Sets A and B have median values of 4, and Data Set C has a median value of 1." I didn't bother to check data sets A and B, but C is obviously wrong (Median for C would be 4).