VitCap {MethComp}

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

data(VitCap)
Vcap <- Meth( VitCap )
str( Vcap )
plot( Vcap )