popu
is an R data frame that is computed
by comp_popu
from the current
frequency information (contained in freq
).
Each individual is represented as a row;
columns represent the individual's
condition (TRUE
or FALSE
),
a corresponding decision
(also encoded as TRUE
= positive or FALSE
= negative),
and its classification (i.e., its case or cell combination, in SDT terms), as
true positive (hit hi
),
false negative (miss mi
),
false positive (false alarm fa
), or
true negative (correct rejection cr
).