 a child,
the parents had to state the sex of all their children on the birth certificate.
These family records are not necessarily independent, because a given family
may have had several children during this 10 year period, included as 
multiple records.
</p>


<h3>Source</h3>

<p>Edwards, A. W. F. (1958).
An Analysis Of Geissler's Data On The Human Sex Ratio.
<em>Annals of Human Genetics</em>, 
23, 6-15.
</p>


<h3>References</h3>

<p>Friendly, M. and Meyer, D. (2016). 
<em>Discrete Data Analysis with R: