R t검정

1 개요

R t.test()

2 1표본 t검정

(x <- rnorm(12))
##  [1] -0.80677919 -0.53470426  0.98430798  0.70428020  0.25909529  0.05287603
##  [7]  0.39817250  0.15529129 -1.14096331  0.04737570  0.01691522  0.74616298
t.test(x)
## 
## 	One Sample t-test
## 
## data:  x
## t = 0.4003, df = 11, p-value = 0.6966
## alternative hypothesis: true mean is not equal to 0
## 95 percent confidence interval:
##  -0.3306406  0.4776456
## sample estimates:
##  mean of x 
## 0.07350254

3 2표본 t검정

t.test(1:10, y = c(7:20))
## 
## 	Welch Two Sample t-test
## 
## data:  1:10 and c(7:20)
## t = -5.4349, df = 21.982, p-value = 1.855e-05
## alternative hypothesis: true difference in means is not equal to 0
## 95 percent confidence interval:
##  -11.052802  -4.947198
## sample estimates:
## mean of x mean of y 
##       5.5      13.5

t.test(1:10, y = c(7:20, 200))
## 
## 	Welch Two Sample t-test
## 
## data:  1:10 and c(7:20, 200)
## t = -1.6329, df = 14.165, p-value = 0.1245
## alternative hypothesis: true difference in means is not equal to 0
## 95 percent confidence interval:
##  -47.242900   6.376233
## sample estimates:
## mean of x mean of y 
##   5.50000  25.93333

4 같이 보기

• R prop.test()
• R chisq.test()
• t-검정

5 참고

• https://www.rdocumentation.org/packages/stats/versions/3.6.0/topics/t.test