Data relating average number of sperm ejaculated per copulation to physical characterisics of partners involved, for 24 heterosexual couples from Manchester, UK.
data(sperm.comp2)A data frame with 10 columns and 24 rows. The columns are:
an identifier for the couple. These labels correspond to those
given in sperm.comp1.
the number of copulations over which the average sperm count has been calculated.
the average sperm count in millions, per copulation.
age of the female, in years.
height of the female, in cm.
weight of the female, in kg.
age of the male, in years.
height of the male, in cm.
weight of the male, in kg.
volume of one male teste in cubic cm.
In the source article, these data are used to argue that males invest more reproductive effort in heavier females, on the basis of regression modelling. It is worth checking for outliers.