VitCap: Merits of two instruments designed to measure certain aspects of
human lung function (Vital Capacity)
Description
Measurement on certain aspects of human lung capacity for
72 patients on 4
instrument-operative combination, i.e. two different instruments and
two different users, a skilled one and a new one.
Format
A data frame with 288 observations on the following 5 variables.
meth- a factor with levels
StNew, StSkil,
ExpNew and ExpSkil, representing the instrument by user
combinations. See below. item- a numeric vector, the person ID, i.e. the 72 patients
y- a numeric vector, the measurements, i.e. vital capacity.
user- a factor with levels
New Skil, for
the new user and the skilled user instrument- a factor with levels
Exp and St,
for the experimental instrument and the standard one.
Source
V. D. Barnett, Simultaneous Pairwise Linear Structural Relationships,
Biometrics, Mar. 1969, Vol. 25, No. 1, pp. 129-142.Examples
Run this codedata(VitCap)
Vcap <- Meth( VitCap )
str( Vcap )
plot( Vcap )
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