Descriptive Statistics

Cross Tables

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 결석 계
시청 전 49 52 18 50 169
시청 후 6 55 64 44 169

Percentages

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 계
시청 전 41.2 43.7 15.1 100
시청 후 4.8 44 51.2 100

Summary Statistics

  • Red:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NA’s
    -6 10 16 18.6 24 58 26

  • Black:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NA’s
    0 10 16 17.61 24 48 29

Standard Deviation

Red Black
12.31 10.33

t test (Welch’s)

One Sample t-test: diff
Test statistic df P value Alternative hypothesis mean of x
17.08 113 2.198e-33 * * * greater 18.11
Welch Two Sample t-test: diff by group
Test statistic df P value Alternative hypothesis mean in group Red mean in group Black
0.4617 108.7 0.6452 two.sided 18.6 17.61

Plots

Stem and Leaf

## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   -0 | 6
##    0 | 222446688
##    1 | 000002222222244446666888
##    2 | 00224444488
##    3 | 000044666
##    4 | 0
##    5 | 08
## 
## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   0 | 022444
##   0 | 6688
##   1 | 00000222224444444
##   1 | 668888
##   2 | 00000002244444
##   2 | 668
##   3 | 024
##   3 | 6
##   4 | 04
##   4 | 8
## $Red
## NULL
## 
## $Black
## NULL

Box plot

QQplot