Lowest value: 2
Highest value: 19
Median: 8
Lower quartile: 6
Upper quartile: 14
Range: Highest value - Lowest value = answer
Range: 19 - 2 = 17
Interquartile range: Upper quartile - Lower quartile = answer
(IQR) interquartile range = 14 - 6 = 8
So the answer to your question would be 8 :)
~hope this helps, have a good day/afternoon/night~