and Lee's  data on the heights of parents and children classified by gender
</h2>

<h3>Description</h3>

<p>Wachsmuth et. al (2003) noticed that a loess smooth through Galton's data
on heights of mid-parents and their offspring exhibited a slightly non-linear
trend, and asked whether this might be due to Galton having pooled the heights of
fathers and mothers and sons and daughters in constructing his tables and graphs.
</p>
<p>To answer this question, they used analogous data from English families at about