Description Usage Format Source Examples
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.
1 |
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.
V. D. Barnett, Simultaneous Pairwise Linear Structural Relationships, Biometrics, Mar. 1969, Vol. 25, No. 1, pp. 129-142.
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The following variables from the dataframe
"VitCap" are used as the Meth variables:
meth: meth
item: item
y: y
#Replicates
Method 1 #Items #Obs: 288 Values: min med max
StNew 72 72 72 960 1985 4180
StSkil 72 72 72 920 2125 4040
ExpNew 72 72 72 600 1945 3960
ExpSkil 72 72 72 640 1940 4150
Classes ‘Meth’ and 'data.frame': 288 obs. of 6 variables:
$ meth : Factor w/ 4 levels "StNew","StSkil",..: 2 2 2 2 2 2 2 2 2 2 ...
$ item : Factor w/ 72 levels "1","2","3","4",..: 1 2 3 4 5 6 7 8 9 10 ...
$ repl : Factor w/ 1 level "1": 1 1 1 1 1 1 1 1 1 1 ...
$ y : num 3450 1310 3820 2110 1860 1940 2360 2880 1980 3120 ...
$ user : Factor w/ 2 levels "New","Skil": 2 2 2 2 2 2 2 2 2 2 ...
$ instrument: Factor w/ 2 levels "Exp","St": 2 2 2 2 2 2 2 2 2 2 ...
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