This figure shows an Excel spreadhseet for JC Electrics (Quarterly data of units sold). The first column, labelled Values, lists the values 7, 8, 9, 10, 11, 12, 13, 14, 15 The second column, labelled Frequency, contains the values 4, 2, 5, 2, 3, 3, 2, 2, 1.