Question 775906
13,14,7,12,17,8,10,6,15,18,21,20

Ordered data is:

6,7,8,10,12,13,14,15,17,18,20,21

q1 =  (8+10)/2 = 9

q2 = (13+14)/2 = 13.5

q3 = (17+18)/2 = 17.5

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