oup Obs Missing      Mean Std. Err.          95% CI</span></span>
<span><span class="co">##    mri$sex = Female 369       4 0.5287671    0.0261  [0.4776, 0.58]</span></span>
<span><span class="co">##      mri$sex = Male 366       6 0.3972222    0.0258 [0.3467, 0.448]</span></span>
<span><span class="co">##          Difference 735      10 0.1315449    0.0367 [0.0596, 0.203]</span></span>
<span><span class="co">## Summary:</span></span>
<span><span class="co">## </span></span>
<span><span class="co">##  Ho: D