vcdExtra (version 0.6-5)

Geissler: Geissler's Data on the Human Sex Ratio

Description

Geissler (1889) published data on the distributions of boys and girls in families in Saxony, collected for the period 1876-1885. The Geissler data tabulates the family composition of 991,958 families by the number of boys and girls listed in the table supplied by Edwards (1958, Table 1).

Usage

data(Geissler)

source

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

Details

The data on family composition was available because, on the birth of 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.

References

Geissler, A. (1889). Beitrage zur Frage des Geschlechts verhaltnisses der Geborenen Z. K. Sachsischen Statistischen Bureaus, 35, n.p. Lindsey, J. K. & Altham, P. M. E. (1998). Analysis of the human sex ratio by using overdispersion models. Journal of the Royal Statistical Society: Series C (Applied Statistics), 47, 149-157.

See Also

Saxony, containing the data for families of size 12.

Examples

data(Geissler)
## maybe str(Geissler) ; plot(Geissler) ...

# reproduce Saxony data, families of size 12
Saxony12<-subset(Geissler, size==12, select=c(boys, Freq))
rownames(Saxony12)<-NULL

# make a 1-way table
xtabs(Freq~boys, Saxony12)

# extract data for other family sizes
Saxony11<-subset(Geissler, size==11, select=c(boys, Freq))
rownames(Saxony11)<-NULL
Saxony10<-subset(Geissler, size==10, select=c(boys, Freq))
rownames(Saxony10)<-NULL