|
1 |
6 |
||||||
|
2 |
9 |
||||||
|
3 |
5 |
||||||
|
4 |
0 |
3 |
4 |
||||
|
5 |
|||||||
|
6 |
1 |
5 |
5 |
8 |
|||
|
7 |
4 |
5 |
6 |
8 |
8 |
||
|
8 |
1 |
1 |
2 |
3 |
6 |
7 |
8 |
|
9 |
0 |
1 |
3 |
4 |
9 |
Stem Plot Exam Grades
Q1 = 61, Q3 = 87.
IQR = Q3 – Q1 = 87-61 = 26
1.5xIQR = 1.5x26 = 39
Q1 – 1.5 IQR = 61 – 39 = 22
Q3 + 1.5IQR = 87 + 39 = 126.
Conclusion: According to 1.5IQR Rule: 16 is the only potential outlier.