5.2]</span></span>
<span><span class="co">## </span></span>
<span><span class="co">##  Ho: difference in  means = 0 ; </span></span>
<span><span class="co">##  Ha: difference in  means != 0 </span></span>
<span><span class="co">##  t = 4.194 , df = 721 </span></span>
<span><span class="co">##  Pr(|T| &gt; t) =  3.08428e-05</span></span></code></pre>
<p>If we prefer to run the test using summary statistics (sample mean,
sample standard deviation, and sample size) we can instead use the
<code>ttesti</code> fu