문제지
분할표
집계표
정답률 비교(%)
학생별 점수 산출
  [10,20) [20,30) [30,40) [40,50) [50,60) [60,70) [70,80) [80,90) [90,100]
영문 3 7 2 5 11 16 9 2 0
국문 1 0 0 7 12 31 10 0 0
그룹별 통계요약
줄기-잎 그림(전체)
## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   1 | 2
##   1 | 666
##   2 | 04444
##   2 | 88
##   3 | 
##   3 | 66
##   4 | 000444444
##   4 | 888
##   5 | 2222222222222
##   5 | 6666666666
##   6 | 0000000000000044444444444444444
##   6 | 8888888888888888
##   7 | 2222222222222
##   7 | 666666
##   8 | 00
줄기-잎 그림(영문)
## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   1 | 266
##   2 | 0444488
##   3 | 66
##   4 | 44488
##   5 | 22222266666
##   6 | 0000004444448888
##   7 | 222226666
##   8 | 00
줄기-잎 그림(국문)
## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   1 | 6
##   2 | 
##   3 | 
##   4 | 0004448
##   5 | 222222266666
##   6 | 0000000044444444444888888888888
##   7 | 2222222266
t-test
Welch Two Sample t-test: media_effects_score by media_effects$group
Test statistic df P value Alternative hypothesis mean in group 영문 mean in group 국문
-2.41 85.9 0.0183 * two.sided 53.6 60.5

Plots

Box Plots

QQ plot

ECDF plot