| tb.dilute {ISwR} | R Documentation |
The tb.dilute data frame has 18 rows and 3 columns. It contains
data from a drug test involving dilutions of tuberculin.
tb.dilute
This data frame contains the following columns:
reactiona numeric vector, reaction sizes (average of diameters) for tuberculin skin pricks.
animala factor with levels 1–6.
logdosea factor with levels 0.5, 0, and -0.5.
The actual dilutions were 1:100, 1:100√{10}, 1:1000.
Setting the middle one to 1 and using base-10 logarithms gives
the logdose values.
Anon. (1977), Exercises in Applied Statistics, part of Exercise 4.15, Dept.\ of Theoretical Statistics, Aarhus University.