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:
reaction
a numeric vector, reaction sizes (average of diameters) for tuberculin skin pricks.
animal
a factor with levels 1
--6
.
logdose
a factor with levels 0.5
, 0
, and -0.5
.
The actual dilutions were 1:100, \(1:100\sqrt{10}\), 1:1000.
Setting the middle one to 1 and using base-10 logarithms gives
the logdose
values.