dec_pos
is a frequency that describes the
number of individuals in the current population N
for which the decision is positive (i.e., called or predicted cases).
Details
Key relationships:
to probabilities: The frequency of
dec_pos
individuals depends on the population sizeN
and the decision's proportion of positive decisionsppod
and is split further into two subsets ofhi
by the positive predictive valuePPV
andfa
by the false detection rateFDR = 1 - PPV
.Perspectives:
by condition:
The frequency
dec_pos
is determined by the population sizeN
times the proportion of positive decisionsppod
:by decision:
a. The frequency
hi
is determined bydec_pos
times the positive predictive valuePPV
(aka.precision
):b. The frequency
fa
is determined bydec_pos
times the false detection rateFDR = (1 - PPV)
:
to other frequencies: In a population of size
N
the following relationships hold:
Current frequency information is computed by
comp_freq
and contained in a list
freq
.
References
Consult Wikipedia: Confusion matrix for additional information.
See also
is_freq
verifies frequencies;
num
contains basic numeric parameters;
init_num
initializes basic numeric parameters;
freq
contains current frequency information;
comp_freq
computes current frequency information;
prob
contains current probability information;
comp_prob
computes current probability information.
Other frequencies:
N
,
cond_false
,
cond_true
,
cr
,
dec_cor
,
dec_err
,
dec_neg
,
fa
,
hi
,
mi