The mean of a dataset is a measure of the central tendency of the data, which is calculated by taking the sum of all the values in the dataset and dividing it by the number of values. To find the mean of the data in the table, we need to multiply each score (x) by its frequency (f) and then add all the products together. Finally, we divide the sum by the total number of values, which is the sum of all the frequencies. The mean of the data in the table is 3.26.