用R进行T检验

函数

R进行T检验的函数：t.test()

代码与注释

datafilename="http://www.lichaoping.com/data/IntroQ.csv"  # 数据文件所在位置
mydata=read.table(datafilename,header=T,sep=",")   #读取数据文件
t.test(Ideal ~ Gender,mydata)

数据来源：http://core.ecu.edu/psyc/wuenschk/StatData/IntroQ.csv 。为了方便大家使用，我把数据上传到了：http://www.obhrm.net/data/IntroQ.csv

结果

> t.test(Ideal ~ Gender,mydata)

        Welch Two Sample t-test

data:  Ideal by Gender
t = 17.218, df = 305.4, p-value < 2.2e-16
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
 4.282968 5.388255
sample estimates:
mean in group Female   mean in group Male 
            71.43006             66.59444