Which data set has a wider spread? why? set a: {9, 11, 24, 11, 4, 20, 16, 7, 18, 15, 28, 6} set b: {9, 12, 15, 3, 21, 24, 5, 9, 16, 21} set a has a wider spread because it has more data values than set b. set a has a wider spread because its mean is greater. set a has a wider spread because its range is greater. set b has a wider spread because its median is greater. set b has a wider spread because it is bimodal. nextreset