What are the similarities and differences between these data sets in terms of their centers and their variability? data set a: 1, 2, 4, 1, 9 data set b: 2, 7, 8, 12, 1 select from the drop-down menus to correctly complete the statements. comparing the centers of the data sets, the median for data set a is the median for data set b. further, based on the range, data set is more variable