'RECEIVED
BEFORE THE
POSTAL RATE COMMISSION
WASHINGTON, D.C.
20268-0001
Jm I I
I I 45 RM'96
MOSTAR
RATE~~wHIsS~ON
CFF,CE Ci THE SECRETARY
Special
Services
Fees
and Classifications)
Docket
No.
MC96-3
OFFICE OF THE CONSUMER ADVOCATE
INTERROGATORIES TO UNITED STATES POSTAL SERVICE
WITNESS TIMOTHY D. ELLARD
(OCA/LJSPS-T6-13-16)
(July
11, 1996)
Pursuant
the
Postal
hereby
Rate
submits
documents.
the
to
United
incorporated
sections
Commission,
25 and 26 of
the
interrogatories
Instructions
States
Postal
Office
the
of
Rules
the
and requests
included
with
Service
dated
of
Practice
Consumer
for
production
19,
1996,
by reference.
Respectfully
GAIL WILLETTE
Director
Office
of the
Advocate
OCA Interrogatories
June
submitted,
Consumer
DAVID RUDERMAN
Attorney
Advocate
of
of
1-4
are
hereby
to
Docket
No.
MC96-3
2
/
OCA/USPS-Tb-13.
Effect
Please
on page
73 of
refer
=
l+[Rv(&)]2=
the
formula
for
the
Design
SSR-111:
c(Fdi
6,
to
1
+
-G>2
n-1
’
iy
a.
Please
confirm
variance.
that
If
you
RV in
your
do not
formula
confirm,
refers
please
to
define
relative
the
function
RV.
b.
Please
confirm
variance
of
confirm,
then
term
that
an estimate
Fdi is
on the
given
please
right
by
c
explain
side
of
of
variance
Efi - 5)
the
of
If
n-l
what
your
the
you
numerator
equation
for
the
do not
of
the
Design
last
Effect
represents.
C.
Please
confirm
that
variance
of
an estimate
estimate,
relative
so that
divided
the
relative
L
given
by
please
the
right
RV(&)=
explain
hand
variance
by the
why the
relative
side
your
of
If
variance
equation,
defined
square
variance
n-1
Fy
'
is
of
as the
of
the
Fdi would
you
confirm,
is
since
not
your
..-
be
then
squared
formula
in
Docket
NO. MC963
states
that
provide
d.
6, = I+[RJ~(F,)]'.
a formula
Please
state
computing
e.
Please
3
for
whether
your
1.
If
you
RV(Fdi)
is
i.
Please
confirm
designs
ii.
for
produces
it
is
explain.
variances
the
sample
is
efficient
than
weights
we decide
to
estimation
then
the
refine
Please
motivation
error.
for
the
simple
explain
then
than
a simple
If
you
random
how this
estimation
the
sampling.
and that
because
by making
factors
do not
then
6, when
sample,
6,=1
equal
some sample
and use
random
the
or
do confirm,
weights
to
ratio
you
we have
Fdi,
adjustment
6,>1.
sampling
for
in
considering
same size.
If
a simple
explain
for
interpret
sample
figure
Effect,
greater
possible
smaller
of
Design
do confirm,
how to
we have
please
RV(Fdi)
you
explain
Suppose
the
please
please
more
the
a value
If
design
please
confirm,
figures.
confirm,
produce
do not
square
formula
that
sample
confirm,
you
nonnegative.
to
random
not
your
do not
you
RV function.
Effect
I always
that
,/--.
or
that
6, = l+[RV(F,)]2
to
the
Design
confirm
If
Fdi=F,i.
FdlfFej,
can make sense
to
If
a ratio
so that
is
using
decrease
when
Docket
f.
No.
MC96-3
Please
4
provide
an illustration
and the
confidence
SSR-111
to
estimates
indicate
values
of
interest."
a.
73 of
weight
Please
confirm
formula
for
the
If
Fdi in
refer
the
6, values
on page
the
74 of
Group
testimony.
each
I
Please
variable
the
formula
this
Ffii used
in
and include
do not
of
the
respondent
trimmed
you
terms
your
for
to
In
i-th
that
has been
adjustment.
used
SSR-111.
of
13 of
for
the
in
the
formula.
Please
on page
"final
page
apply
given
intervals
are
interval
OCA/USPS-T6-14.
the
5,
how to
formula
confidence
Table
what
confidence
Effect
interval
form
of
of
confirm,
variables
for
the
formula,
the
Fdi represent
in
d-th
sub-domain
the
the
Design
a ratio
please
defined
Design
Effect
estimation
provide
a formula
on pages
52-53
of
SSR-111.
b.
Please
that
describe
could
valid
C.
other
Effect
Suppose
that
several
different
applied,
of
incorporated
be
Design
types
into
the
adjustment
Fdi factors
factors
to
compute
estimates.
a particular
depending
weighting
ratio
on the
respondent
estimation
specific
could
have
adjustment
characteristic
one
of
factors
being
Docket
No.
MC96-3
5
tabu1ated.l
for
Then
each
question
situation,
Please
of
sample
design
a.
b.
,c-.
.-.--
16-23
for
have
a particular
design
than
1.0,
to
the
sub-
random
that
is
sample
more
and a less
a S considerably
refer
Effect?
can be interpreted
a simple
a sample
a
be
Design
Effect
example,
a 6 less
should
the
design
such
kle used
larger
survey
efficient
than
1.0.
questionnaire
at
SSR-111.
Please
confirm
two
the
of
have
Please
of
Design
would
In
factor
compute
survey
1.0,
factor
a respondent.
the
For
could
OCA/USPS-T6-15.
pages
the
a 6 of
could
to
Fdi to
interest.
have
efficient
the
of
weighting
estimation
whether
as a property
domain
ratio
into
explain
would
given
which
incorporated
d.
a different
that
each
,proposed
three
size
If
you
Please
explain
do not
why it
each
of
the
respondents
each
of
the
three
rate
respondent
tested
confirm,
would
is
rates
please
have
whether
been
they
only
for
questioned
his
tier
on
and box
explain.
inappropriate
would
have
to
ask
accepted
alternatives.
in MC95-1 the
1 For example,
different
ratio
estimation
factor
for each scenario
tested.
market
research
for each rate
survey
tabulation
used a
cell,
~-
Docket
No.
MC96-3
6
,c-OCA/USPS-T6-16.
Please
refer
to
tables
2 to
7 of
your
testimony.
a.
Please
confirm
the
figures
not
confirm,
Table
b.
Please
would
accept
confirm
would
accept
8129
would
confirm,
2 to
in
6 of
Table
your
the
7 are
summaries
testimony~
source
for
If
each
of
you
figure
do
in
not
accept
price"
in
is
that
the
Group
1 total
16653.
If
you
do not
8129
out
of
4 shows
that
new price,
the
so that
lowest
27642
1951.3 = 27642-
price.
If
you
between
the
Group
1 in
do not
explain.
discrepancy
lowest
figure
confirm
price
lowest
any
the
Please
Table
accept
explain
7 states
no increase
that
please
Please
Table
explain.
the
equivalant
e.
figures
provide
that
please
Please
not
Tables
please
confirm
confirm,
d.
in
the
7.
that
C.
that
price
derived
that
Table
the
7 should
and nothing
for
from
row
Table
number
that
would
Table
7 and
4.
labled
"Would
accept
lowest
be labled
"Would
accept
lowest
If
do not
confirm,
"Would
accept
higher."
you
the
please
explain.
f.
Please
confirm
that
should
be labled
"Would
accept
higher."
If
do not
confirm,
you
the
row
labled
mid
price
please
mid
and nothing
explain.
--
price"
Docket
No.
MC96-3
Y--.
CERTIFICATE
I hereby
document
accordance
upon
certify
all
with
that
I have
participants
section
3.B(3)
OF SERVICE
this
date
of
record
of
the
in
served
this
special
DAVID RUDERMAN
Attorney
Washington,
D.C.
July 11, 1996
,,-.
20268-0001
the
:Eoregoing
proceeding
rules
of
in
practice.