\begin{Schunk}
\begin{Sinput}
 t.test(sei ~ sex, data = dat)
\end{Sinput}
\begin{Soutput}
	Welch Two Sample t-test

data:  sei by sex
t = 0.39224, df = 4015.9, p-value = 0.6949
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
 -0.9520256  1.4282301
sample estimates:
  mean in group MALE mean in group FEMALE 
            49.54071             49.30261 
\end{Soutput}
\end{Schunk}
