Descriptive Statistics

Cross Tables

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 결석 계
시청 전 74 65 5 20 164
시청 후 7 58 78 21 164

Percentages

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 계
시청 전 51.4 45.1 3.5 100
시청 후 4.9 40.6 54.5 100

Summary Statistics

  • Red:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NA’s
    -4 16 18 20.26 25 66 10

  • Black:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NA’s
    -6 12 20 19.63 28 60 11

Standard Deviation

Red Black
10.9 12.02

t test (Welch’s)

One Sample t-test: diff
Test statistic df P value Alternative hypothesis mean of x
20.89 142 1.94e-45 * * * greater 19.95
Welch Two Sample t-test: diff by group
Test statistic df P value Alternative hypothesis mean in group Red mean in group Black
0.3289 138.3 0.7428 two.sided 20.26 19.63

Plots

Stem and Leaf

## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   -0 | 42
##    0 | 0244688
##    1 | 02444444466666668888888888888
##    2 | 000222224444444456666668
##    3 | 002224468
##    4 | 
##    5 | 2
##    6 | 6
## 
## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   -0 | 622
##    0 | 22244666688
##    1 | 000222246666668888
##    2 | 00000002222246666668888
##    3 | 000000222226
##    4 | 2
##    5 | 0
##    6 | 0
## $Red
## NULL
## 
## $Black
## NULL

Box plot

QQplot