A data frame with 21 observations on the following 12 variables.
id ID number
sex a factor with
levels F
andM
smoker a factor with levels
N
, Y
opinion opinion of the odor
(indiff
, neg
, or pos
)
age age of
subject (in years)
first which treatment was first,
scented
or unscented
u1 time (in seconds) in
first unscented trial
u2 time (in seconds) in second
unscented trial
u3 time (in seconds) in third unscented
trial
s1 time (in seconds) in first scented trial
s2 time (in seconds) in second scented trial
s3 time (in seconds) in third scented trial