20190528-1

---

20190528-2

---

20190528-3

---

20190528-4

## 'data.frame':    100 obs. of  5 variables:
##  $ 학번: int  1 2 3 4 5 6 7 8 9 10 ...
##  $ 분반: Factor w/ 3 levels "A","B","C": 1 1 1 1 1 1 1 1 1 1 ...
##  $ DB  : int  50 79 9 20 65 71 2 69 65 92 ...
##  $ OS  : int  23 32 41 19 47 32 42 23 41 73 ...
##  $ CA  : int  60 17 15 78 30 44 5 20 19 50 ...

---

20190528-5

---

20190528-6

---

20190528-7