Use the following data sets to answer the question.
set b: {9,30,12,3,16,11,18}
set b: {9,30,12,3,16,11,18}

which statement about the shape of the data is true?
a. both sets have the same median, but set b has a larger mean.
b. set a has a lower median but a higher mean than set b.
c. both sets have the same median, but set a has a larger mean.
d. set b has a larger mean and median than set a.