均值t检验，方差卡方检验例题(R语言)

题目

程序及结果

1)程序

x<-c(4,9,11,13,18,20,24,28,45,67)
y<-c(5,7,8,12,19,23,32,36,40,52)
t.test(x,y,var.equal=TRUE)

1)结果

	Two Sample t-test

data:  x and y
t = 0.063425, df = 18, p-value = 0.9501
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
 -16.06238  17.06238
sample estimates:
mean of x mean of y 
     23.9      23.4 

2)程序

x<-c(4,9,11,13,18,20,24,28,45,67)
y<-c(5,7,8,12,19,23,32,36,40,52)
var.test(x,y,conf.level=0.99)

2)结果

	F test to compare two variances

data:  x and y
F = 1.4105, num df = 9, denom df = 9, p-value = 0.6166
alternative hypothesis: true ratio of variances is not equal to 1
99 percent confidence interval:
 0.2156353 9.2261387
sample estimates:
ratio of variances 
           1.41049 

结果分析

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