Q1 | Q2 | Q3 | Q4 | Q5 | Q6 | Q7 | Q8 | Q9 | Q10 | Q11 | Q12 | Q13 | Q14 | Q15 | Q16 | Q17 | Q18 | Q19 | Q20 | Q21 | Q22 | Q23 | Q24 | Q25 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
16 | 16 | 651 | 16 | 20 | 69 | 772 | 69 | 112 | 30 | 738 | 31 | 19 | 43 | 41 | 679 | 212 | 47 | 754 | 52 | 48 | 48 | 751 | 75 | 43 |
20 | 27 | 71 | 19 | 754 | 70 | 27 | 70 | 465 | 718 | 48 | 273 | 712 | 61 | 120 | 85 | 63 | 727 | 27 | 85 | 666 | 148 | 45 | 65 | 656 |
818 | 75 | 53 | 801 | 68 | 163 | 37 | 92 | 257 | 75 | 47 | 520 | 67 | 33 | 590 | 52 | 53 | 44 | 48 | 683 | 67 | 75 | 38 | 666 | 117 |
2 | 738 | 81 | 20 | 14 | 554 | 20 | 625 | 22 | 33 | 23 | 32 | 58 | 719 | 105 | 40 | 528 | 38 | 27 | 36 | 75 | 585 | 22 | 50 | 40 |
Q1 | Q2 | Q3 | Q4 | Q5 | Q6 | Q7 | Q8 | Q9 | Q10 | Q11 | Q12 | Q13 | Q14 | Q15 | Q16 | Q17 | Q18 | Q19 | Q20 | Q21 | Q22 | Q23 | Q24 | Q25 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2 | 2 | 76 | 2 | 2 | 8 | 90 | 8 | 13 | 4 | 86 | 4 | 2 | 5 | 5 | 79 | 25 | 5 | 88 | 6 | 6 | 6 | 88 | 9 | 5 |
2 | 3 | 8 | 2 | 88 | 8 | 3 | 8 | 54 | 84 | 6 | 32 | 83 | 7 | 14 | 10 | 7 | 85 | 3 | 10 | 78 | 17 | 5 | 8 | 77 |
96 | 9 | 6 | 94 | 8 | 19 | 4 | 11 | 30 | 9 | 5 | 61 | 8 | 4 | 69 | 6 | 6 | 5 | 6 | 80 | 8 | 9 | 4 | 78 | 14 |
0 | 86 | 9 | 2 | 2 | 65 | 2 | 73 | 3 | 4 | 3 | 4 | 7 | 84 | 12 | 5 | 62 | 4 | 3 | 4 | 9 | 68 | 3 | 6 | 5 |
막대그래프로 답안 분포를 시각적으로 살핀다. 차후 나오는 정답률과 함께 어느 문항에서 어느 답안을 많이 고르는지 파악하는 데 활용한다.
barplot
ggplot
Q1 | Q2 | Q3 | Q4 | Q5 | Q6 | Q7 | Q8 | Q9 | Q10 | Q11 | Q12 | Q13 | Q14 | Q15 | Q16 | Q17 | Q18 | Q19 | Q20 | Q21 | Q22 | Q23 | Q24 | Q25 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
R | R | R | R | W | R | R | W | W | R | R | W | R | R | W | R | R | R | R | R | R | W | R | R | R |
R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R |
R | R | R | R | R | R | R | R | W | R | R | W | R | R | R | R | W | R | R | R | R | W | R | R | R |
R | R | W | R | R | W | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R |
R | R | R | R | R | R | R | R | R | R | R | R | R | R | W | R | R | R | R | R | R | R | R | R | R |
R | R | R | R | R | R | R | R | W | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R |
76, 100, 84, 92, 96, 96, 60, 40, 92, 80, 84, 84, 88, 92, 84, 60, 92, 64, 88, 92, 92, 52, 100, 84, 92, 20, 72, 88, 92, 76, 96, 80, 96, 24, 92, 84, 88, 60, 88, 88, 56, 92, 92, 32, 68, 36, 88, 88, 68, 80, 92, 96, 88, 92, 80, 80, 92, 84, 92, 60, 72, 92, 96, 84, 92, 96, 96, 96, 92, 68, 80, 88, 92, 76, 88, 100, 96, 84, 84, 80, 88, 88, 88, 96, 56, 92, 72, 84, 72, 88, 92, 88, 88, 92, 88, 92, 92, 88, 68, 80, 80, 76, 84, 80, 96, 80, 80, 84, 76, 84, 88, 84, 36, 84, 100, 80, 84, 80, 60, 88, 84, 68, 92, 44, 68, 68, 92, 80, 80, 84, 8, 100, 68, 92, 84, 84, 92, 80, 88, 88, 84, 80, 92, 92, 48, 88, 84, 28, 84, 76, 100, 8, 100, 92, 92, 84, 88, 12, 16, 84, 96, 56, 96, 96, 84, 100, 100, 100, 72, 72, 96, 96, 80, 100, 72, 24, 44, 76, 68, 96, 96, 36, 80, 96, 56, 92, 76, 92, 92, 40, 84, 100, 92, 56, 88, 88, 92, 40, 52, 92, 100, 60, 52, 76, 32, 92, 96, 84, 88, 80, 40, 84, 92, 44, 96, 92, 76, 92, 60, 92, 92, 96, 40, 92, 88, 76, 88, 24, 92, 96, 88, 92, 60, 92, 80, 80, 88, 92, 92, 100, 80, 12, 84, 92, 96, 76, 76, 100, 84, 96, 76, 76, 84, 100, 96, 100, 76, 36, 36, 64, 32, 100, 100, 92, 80, 84, 88, 88, 28, 100, 76, 60, 92, 64, 80, 84, 92, 76, 72, 92, 92, 96, 80, 96, 84, 76, 92, 88, 88, 96, 92, 88, 88, 84, 20, 64, 76, 72, 92, 92, 20, 48, 72, 72, 56, 88, 80, 52, 64, 68, 24, 92, 92, 12, 80, 80, 88, 100, 92, 64, 92, 88, 84, 80, 88, 88, 68, 92, 24, 96, 88, 88, 48, 96, 96, 84, 84, 88, 88, 96, 76, 44, 60, 96, 52, 84, 92, 96, 100, 80, 84, 96, 92, 96, 96, 88, 88, 100, 80, 88, 48, 88, 84, 96, 92, 92, 100, 92, 92, 80, 88, 28, 24, 76, 76, 84, 84, 24, 88, 84, 68, 92, 60, 100, 92, 76, 24, 100, 84, 76, 84, 92, 44, 36, 88, 84, 92, 92, 92, 32, 76, 96, 84, 68, 80, 60, 64, 80, 84, 92, 80, 92, 72, 92, 84, 100, 100, 84, 24, 80, 88, 96, 88, 76, 92, 92, 80, 76, 80, 88, 92, 100, 64, 32, 20, 88, 80, 84, 28, 84, 96, 20, 32, 84, 88, 88, 40, 96, 68, 52, 20, 88, 40, 76, 72, 84, 84, 68, 80, 76, 80, 92, 84, 84, 96, 92, 96, 96, 84, 32, 88, 88, 24, 88, 20, 88, 96, 92, 92, 64, 96, 84, 100, 80, 96, 76, 48, 84, 84, 32, 76, 84, 28, 100, 96, 92, 92, 88, 88, 92, 88, 36, 80, 88, 88, 52, 96, 28, 88, 48, 96, 84, 52, 88, 84, 56, 84, 100, 96, 64, 84, 96, 80, 72, 84, 96, 96, 88, 80, 92, 92, 84, 92, 76, 16, 20, 92, 96, 80, 88, 96, 96, 28, 80, 88, 92, 100, 84, 80, 88, 96, 88, 52, 28, 84, 80, 64, 92, 84, 76, 92, 96, 84, 80, 88, 88, 76, 68, 88, 80, 88, 84, 96, 92, 52, 80, 12, 80, 88, 96, 88, 80, 92, 84, 24, 92, 100, 84, 92, 88, 84, 96, 60, 88, 88, 84, 88, 92, 84, 36, 100, 100, 92, 96, 68, 96, 80, 80, 100, 88, 56, 92, 92, 80, 92, 76, 96, 92, 84, 80, 84, 76, 92, 72, 84, 100, 84, 92, 80, 96, 92, 96, 92, 32, 100, 16, 44, 24, 32, 76, 84, 92, 44, 72, 96, 84, 96, 96, 84, 96, 96, 96, 92, 92, 84, 96, 92, 76, 84, 100, 84, 100, 96, 88, 76, 48, 100, 52, 84, 16, 88, 88, 88, 76, 96, 40, 88, 28, 44, 96, 96, 84, 76, 80, 84, 36, 72, 88, 84, 100, 92, 100, 84, 40, 56, 92, 96, 12, 88, 84, 76, 28, 92, 88, 100, 32, 80, 76, 88, 92, 92, 80, 80, 84, 80, 100, 80, 76, 92, 88, 96, 72, 92, 96, 80, 92, 24, 68, 96, 80, 96, 92, 88, 96, 88, 88, 80, 92, 88, 28, 88, 84, 96, 100, 100, 80, 72, 16, 92, 24, 84, 84, 88, 96, 96, 92, 80, 32, 40, 48, 84, 84, 84, 88, 80, 88, 92, 92, 88, 80, 80, 68, 76, 100, 72, 24, 72, 96, 80, 84, 68, 92, 68, 84, 64, 28, 64, 96, 96, 84, 52, 100, 84, 84, 28, 32, 28, 20, 64, 60, 80, 96, 56, 88, 92, 100, 20, 36, 80, 88, 76, 84, 60, 88, 64, 36, 84, 92, 72, 56, 48, 64, 80, 96, 76, 88, 88, 76, 92, 92, 40, 80, 92, 76, 76, 16, 84, 28, 20, 84, 16, 20, 84, 80, 92, 88, 84, 84, 28, 92, 88, 88, 32, 32, 16 and 76
Red:
Min. | 1st Qu. | Median | Mean | 3rd Qu. | Max. |
---|---|---|---|---|---|
8 | 72 | 84 | 77.5 | 92 | 100 |
Black:
Min. | 1st Qu. | Median | Mean | 3rd Qu. | Max. |
---|---|---|---|---|---|
8 | 76 | 84 | 78.2 | 92 | 100 |
##
## The decimal point is 1 digit(s) to the right of the |
##
## 0 | 88
## 1 | 2222266666666
## 2 | 0000000000004444444444444448888888888888888
## 3 | 22222222222222266666666666
## 4 | 0000000000044444444888888888
## 5 | 22222222222266666666666
## 6 | 0000000000000004444444444444444888888888888888888888
## 7 | 22222222222222222222226666666666666666666666666666666666666666666666
## 8 | 00000000000000000000000000000000000000000000000000000000000000000000+232
## 9 | 22222222222222222222222222222222222222222222222222222222222222222222+152
## 10 | 000000000000000000000000000000000000000000000000000
score %>%
`[`(literacy$group == "Red") %>%
stem(scale = 0.5)
##
## The decimal point is 1 digit(s) to the right of the |
##
## 0 | 8
## 1 | 2266666
## 2 | 000444444888888888
## 3 | 222222222266666
## 4 | 000000444448888
## 5 | 2222222266666
## 6 | 000000000044444448888888888888
## 7 | 22222222222222666666666666666666666666
## 8 | 00000000000000000000000000000000000004444444444444444444444444444444+63
## 9 | 22222222222222222222222222222222222222222222222222222222222222222222+39
## 10 | 000000000000000000000000
score %>%
`[`(literacy$group == "Black") %>%
stem(scale = 0.5)
##
## The decimal point is 1 digit(s) to the right of the |
##
## 0 | 8
## 1 | 222666
## 2 | 0000000004444444448888888
## 3 | 22222666666
## 4 | 0000044488888
## 5 | 2222666666
## 6 | 0000044444444488888888
## 7 | 222222226666666666666666666666666666
## 8 | 00000000000000000000000000000000000000000000444444444444444444444444+89
## 9 | 22222222222222222222222222222222222222222222222222222222222226666666+33
## 10 | 000000000000000000000000000
Red 와 Black으로부터 관찰된 점수들의 평균에 대하여 t test를 적용하였더니 기초통계량에서 살핀 것을 뒷받침해 주듯이 p-value 가 0.767로 매우 큰 값이 나왔습니다. 평균은 매우 닮았다는 뜻입니다.
Test statistic | df | P value | Alternative hypothesis | mean in group Red | mean in group Black |
---|---|---|---|---|---|
-0.48 | 853.8 | 0.6314 | two.sided | 77.5 | 78.21 |
카이제곱테스트로 Red와 Black에 들어간 등급별 인원수가 얼마나 닮았는지를 살펴보았지만 t-test에서와 마찬가지로 통계적으로 유의한 차이가 관찰되었습니다.
I | II | III | IV | 계 |
---|---|---|---|---|
42 | 70 | 97 | 647 | 856 |
I | II | III | IV | 계 |
---|---|---|---|---|
4.91 | 8.18 | 11.33 | 75.58 | 100 |
I | II | III | IV | 계 | |
---|---|---|---|---|---|
Red | 17 | 39 | 57 | 310 | 423 |
Black | 25 | 31 | 40 | 337 | 433 |
계 | 42 | 70 | 97 | 647 | 856 |
Test statistic | df | P value |
---|---|---|
5.016 | 2 | 0.08145 |
유형 | 정답률(%) | |
---|---|---|
문1 | 사실적 | 95.6 |
문2 | 사실적 | 86.2 |
문3 | 비판적 | 76.1 |
문4 | 사실적 | 93.6 |
문5 | 추론적 | 88.1 |
문6 | 추론적 | 64.7 |
문7 | 추론적 | 90.2 |
문8 | 사실적 | 73.0 |
문9 | 추론적 | 30.0 |
문10 | 추론적 | 83.9 |
문11 | 사실적 | 86.2 |
문12 | 사실적 | 60.7 |
문13 | 사실적 | 83.2 |
문14 | 추론적 | 84.0 |
문15 | 사실적 | 68.9 |
문16 | 사실적 | 79.3 |
문17 | 추론적 | 61.7 |
문18 | 비판적 | 84.9 |
문19 | 사실적 | 88.1 |
문20 | 사실적 | 79.8 |
문21 | 사실적 | 77.8 |
문22 | 비판적 | 68.3 |
문23 | 추론적 | 87.7 |
문24 | 사실적 | 77.8 |
문25 | 추론적 | 76.6 |
문3 | 문6 | 문8 | 문9 | 문12 | 문15 | 문16 | 문17 | 문20 | 문21 | 문22 | 문24 | 문25 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
정답률 | 76.1 | 64.7 | 73 | 30 | 60.7 | 68.9 | 79.3 | 61.7 | 79.8 | 77.8 | 68.3 | 77.8 | 76.6 |
문6 | 문9 | 문12 | 문15 | 문17 | 문22 | |
---|---|---|---|---|---|---|
정답률 | 64.7 | 30 | 60.7 | 68.9 | 61.7 | 68.3 |
문9 | |
---|---|
정답률 | 30 |
문9 | |
---|---|
정답률 | 30 |