Select the correct answer
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}
a. set a
b. set b
has a wider spread because
a. its mean is greater
b. its range is greater