Answer:
The person who has the greatest spread is Jezebal because his range is 22 while Collin's range is 18.
Jezebal's range :
26 - 4 =22
Collin's range:
21 - 3 = 18
The person who has the least IQR is Collin
Jezebal :
4, 5, 8, 10, 11, 14, 20, 20, 26
Since there are nine values 11 is the median so the first quartile is 6.5 and the third quartile is 20. 20 - 6 = 14
Collin : 3, 9, 9, 14, 15, 16, 17, 20, 21
The median is 15, the first quartile is 9 and the third quartile is 18.5. 18.5 - 9 = 9.5
Jezebal has the greatest spread
Collin has the least IQR
Do you do K12 by any chance?