That’s a typo, there is ONE
univariate table with all 18 modes.
Penelope Weinberger
CTPP Program Manager
AASHTO
202-624-3556
It's just as bad to not make a plan as to
blindly follow the one you already have.
From:
ctpp-news-bounces@chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Mike Harmon
Sent: Monday, April 20, 2009 2:25
PM
To: ctpp-news@chrispy.net
Subject: RE: [CTPP] CTPP 3-year
table request "The is also none univariatetable with all 18 modes"
Can someone help me understand what the text quoted above is supposed
to say?
Thank you,
-----Original Message-----
From: ctpp-news-bounces@chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On
Behalf Of Ed Christopher
Sent: Sunday, April 19, 2009 7:29 AM
To: ctpp-news maillist
Subject: [CTPP] CTPP 3-year table request
Earlier this month the AASHTO CTPP Oversight Board submitted a request
for a special tabulation of 3-year ACS tables. For those who
might not
remember, just over a year ago the Oversight Board submitted a similar
request that met with some harsh disclosure and suppression rules.
After an appeal of the rules failed, the Oversight Board set up a
subcommittee to develop a new request that hopefully would be more
favorably received by the Census Bureau's Disclosure Review
Board. It
was believed that now that the disclosure proofing rules are known it
would be possible to design data tables that would yield the maximum
utility possible while still adhering to the rules.
A copy of the new table request letter and tables can be found at the
following locations respectively.
http://trbcensus.com/aashto/docs/CTPP_3-year_table_request.pdf
http://trbcensus.com/aashto/docs/CTPPtables-09apr01-1.xls
One of the major differences of the new request from last year’s
is that
modes used to go to work have been collapsed. In 2008 we were
asking
for crosstabs using 5, 8 and 11 modes. With the 2009 request we
are
asking for 3, 5, 6 and 10 modes. In addition to the collapsed
modes the
number of variables crossed with “Means of Transportation to
Work” has
been reduced from about 17 to 5. The 5 variables include travel
time to
work, household income, vehicles available, age and time leaving home
to
go to work. Of course it will not be known which tables will pass
the
disclosure rules until we actually see the tables. The is also
none
univariate table with all 18 modes.
When reviewing the potential tables
do not forget that the 3-year ACS is only for areas with more than
20,000 residents.
The Census Bureau and their Disclosure Review Board (DRB) are currently
reviewing the proposal and the Oversight Board is hopeful that it will
be approved. Once the DRB is OK with the proposal it will pass
over to
the ACS Office and they will prepare a cost estimate after which a
final
decision by the Oversight Board will be made.
--
Ed Christopher
708-283-3534 (V)
708-574-8131 (cell)
FHWA RC-TST-PLN
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