Hlavy {mffSM} | R Documentation |
Data on head (“hlava”, plural “hlavy” in Czech) sizes of
fetuses (from the ultrasound monitoring) in different periods of pregnancy. Each data value (variable y
) is the
average over n measurements.
Orignally, data are provided by Hájek and Vorlíčková (1977, p. 134). They are also used for some illustrations in the book Regrese by Karel Zvára (Zvára, 2008).
data(Hlavy)
A data.frame
with 26 rows and the following variables.
serial number
week of pregnancy
number of measurements used to calculate the average head
size given in the y
variable
the average head size obtained from the n
measurements performed in week t
of pregnancy
http://msekce.karlin.mff.cuni.cz/~zvara/regrese/kniha/R.ZIP
Hájek, J. and Vorlíčková, D.(1977). Matematická statistika. Praha: Státní pedagogické nakladatelství.
Zvára, K. (2008). Regrese. Praha: Matfyzpress. ISBN 978-80-7378-041-8.
data(Hlavy) summary(Hlavy)