Descriptive Statistics

Cross Tables

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 결석 계
시청 전 75 57 7 19 158
시청 후 9 63 58 28 158

Percentages

  식생활을 고치세요 식생활이 보통입니다 식생활이 대체로 좋아요 계
시청 전 54 41 5 100
시청 후 6.9 48.5 44.6 100

Summary Statistics

  • Red:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NA’s
    -6 9 18 19.65 30 64 16

  • Black:

    Min. 1st Qu. Median Mean 3rd Qu. Max. NA’s
    -8 6 16 17.94 27 64 16

Standard Deviation

Red Black
13.91 14.98

t test (Welch’s)

One Sample t-test: diff
Test statistic df P value Alternative hypothesis mean of x
14.62 125 3.784e-29 * * * greater 18.79
Welch Two Sample t-test: diff by group
Test statistic df P value Alternative hypothesis mean in group Red mean in group Black
0.6655 123.3 0.507 two.sided 19.65 17.94

Plots

Stem and Leaf

## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   -0 | 64222
##    0 | 04466688888
##    1 | 00022244466668888
##    2 | 002224466888
##    3 | 0000022224446
##    4 | 0248
##    5 | 
##    6 | 4
## 
## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   -0 | 8642
##    0 | 000000224446688
##    1 | 000022446666668
##    2 | 002222222444688
##    3 | 2444446888
##    4 | 448
##    5 | 
##    6 | 4
## $Red
## NULL
## 
## $Black
## NULL

Box plot

QQplot