Descriptive Statistics

Cross Tables

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 불참 계
시청 전 138 103 15 49 305
시청 후 14 128 114 49 305

Percentages

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 계
시청 전 53.9 40.2 5.9 100
시청 후 5.5 50 44.5 100

Summary Statistics

  • Red:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NAs
    -16 10 18 19.01 26 70 28

  • Black:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NAs
    -4 12 20 20.47 28 54 23

Standard Deviation

Red Black
13.2 11.37

t test (Welch’s)

One Sample t-test: diff
Test statistic df P value Alternative hypothesis mean of x
25.64 253 1.357e-72 * * * greater 19.76
Welch Two Sample t-test: diff by group
Test statistic df P value Alternative hypothesis mean in group Red mean in group Black
-0.9452 241.3 0.3455 two.sided 19.01 20.47

Plots

Stem and Leaf

## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   -1 | 6
##   -1 | 
##   -0 | 86
##   -0 | 
##    0 | 00022222244444
##    0 | 666668888888
##    1 | 000002222224444444
##    1 | 666666666688888888
##    2 | 0000002222244444444444444
##    2 | 66666688888
##    3 | 000244444
##    3 | 66688
##    4 | 02244
##    4 | 8
##    5 | 
##    5 | 8
##    6 | 
##    6 | 
##    7 | 0
## 
## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   -0 | 4
##   0 | 000222222444
##   0 | 66688
##   1 | 0000000022222222444444
##   1 | 666666666666688888888888
##   2 | 000000002222222444444444
##   2 | 66666668888888
##   3 | 0000222222224
##   3 | 6666666888
##   4 | 024
##   4 | 6
##   5 | 24
## $Red
## NULL
## 
## $Black
## NULL

Box plot

QQplot