Wait times (in minutes) at a clinic for 9 patients are listed in order. Q1 = 4.5 and Q3 = 8.5.
Using the 1.5×IQR rule, which value(s) are outliers?
- A
9 and 25
- B
None
- C
2 and 25
- Dcheck_circle
25 only
Explanation
IQR = 4. Upper fence = 8.5 + 6 = 14.5; lower fence = 4.5 − 6 = −1.5. Only 25 exceeds 14.5.