Thank you!
What if I wanted to combine both in a single plot? I tried
data 1 = With[{min = 0, fq = 5/4, md = 4, tq = 5, max = 9},
BoxWhiskerChart[{min, fq, fq, md, tq, tq, max}]]
data 2 = With[{min = 2, fq = 3, md = 10, tq = 11, max = 18},
BoxWhiskerChart[{min, fq, fq, md, tq, tq, max}]]
BoxWhiskerPlot[data1, data2]
But it didn't work. Any help would be appreciated!