Update 2_playing.Rmd

t.test(income$U.S., income$Europe, paired=T)

	Paired t-test

data:  income$U.S. and income$Europe
t = 2.6146, df = 11, p-value = 0.02406
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
 0.007119254 0.082880746
sample estimates:
mean of the differences 
                  0.045 

p-waarde < 0,5 niet kleiner dan 0,2