Ok, so
We're going to organize the data first:
9, 10,10,10,10,11,11,11,11,11,11,12,12,12,12,12,13,13,13,14,14,15,15,15,15,15,15,16, 17,17.
So, we got:
Maximum: 17
Minimum: 9
Median = (12+12)/2, which is 12
Median: 12
The total data has 30 values, so:
Q1 = 1/4(30), which is 7.5
Q3= 3/4(30) which is 22.5
Q1 = 7.5
Q3 = 22.5
