In
the
article
Geometric
Probability
Distribution
for
Modeling
of
Error
Risk
During
Prescription
Dispensing,
American
Journal
of
Health-System
Pharmacists,
Vol.
63,
Issue
11,
the
authors
use
the
geometric
model
to
analyze
how
many
prescriptions
a
pharmacist
can
process
until
the
pharmacist
makes
the
first
dispensing
error,
either
in
labeling
(incorrect
information
or
instructions)
or
drug
content
(omissions;
incorrect
drug,
quantity,
or
strength).
Use
this
Excel
file
geometric
probabilities
2
to
assist
you
with
the
geometric
probability
calculations
required
to
answer
the
questions
below.
Suppose
a
pharmacist's
error
rate
is
0.09.
Question
1.
On
average,
how
many
prescriptions
would
this
pharmacist
process
until
he
or
she
made
the
first
dispensing
error?
«
(use
2
decimal
places
in
your
answer)
Question
2.
What
is
the
probability
that
the
first
dispensing
error
occurs
among
the
first
7
prescriptions?
«
(Use
3
decimal
places
in
your
answer)
Question
3.A
new
trainee
pharmacist
has
an
error
rate
of
0.11.
Find
the
expected
number
of
prescriptions
until
the
first
dispensing
error,
the
median
number
of
prescriptions
until
the
first
dispensing
error,
and
the
probability
that
the
first
dispensing
error
occurs
among
the
first
15
prescriptions.
«
expected
number
(use
2
decimal
places
in
your
answer)
«
prob.
first
error
is
among
first
15
prescriptions
(use
3
decimal
places).
