Please disregard the original email and go with this one instead, the
chief difference being that there is no "three unweighted records for
Means of Transportation (MOT) rule" since we have only five variables we
are crossing with MOT.
Penelope Weinberger
CTPP Program Manager
AASHTO
202-624-3556
http://ctpp.transportation.org/home/default.htm
<http://www.transportation.org>
It's just as bad to not make a plan as to blindly follow the one you
already have.
________________________________
From: ctpp-news-bounces(a)chrispy.net
[mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Weinberger, Penelope
Sent: Monday, April 26, 2010 3:45 PM
To: ctpp-news(a)chrispy.net
Subject: [CTPP] Help determine our request to US Census Bureau for
CTPPSpecial Tabulations based on ACS 5-year (2006-2010) Data
Dear CTPP Community,
This is an opportunity for your input on the upcoming CTPP based on
5-year ACS 2006-2010!
This message contains colored highlighting, if you cannot see it, please
view the message in HTML (if possible).
Please download the attached spreadsheet, mark it as appropriate
according to the instructions and information below, and return it
attached to an email directly to me by Friday, May 7th, 2010
pweinberger(a)aashto.org (Please do not reply to the whole list with your
marked attached spreadsheet, for that will create a version control
nightmare!)
The attached spreadsheet is a proposed table list to submit to the
Census Bureau for special tabulations based on the 5-year ACS, it is
derived from the Census Bureau's Disclosure Review Board's approved CTPP
from 3-year ACS data table list.
For large area geography, we plan to keep the table list the same as the
current 3-year table list (the spreadsheet, as if there were no
highlighting).
For small area geography (tract, TAZ, and block group), we are proposing
to eliminate many of the tables with 3-way cross-tabulations, or 2-way
cross-tabulations with more than 40 cells because we suspect they will
contain very little or no data. We have highlighted the tables proposed
for deletion at small geography in BLUE. Please identify any
highlighted tables you feel are important to keep, and not be eliminated
by placing a mark in the specified column and row.
Alternatively, if you see tables that are not marked for deletion at
small geography please feel free to let me know there is no need for
those tables, it would be a waste of resources to generate data that is
essentially useless to the transportation planning community.
The number of classifications in each variable may need to be reduced to
pass the CB's criteria and some of those tables have been highlighted in
pink, we are including this information to start thinking about the ways
variable groups can collapse.
For the ACS 2006-2010 five-year data and the 2010 Census Tracts, there
is projected to be, on average, a little over 4000 residents per tract,
and approximately 120 household records and 150 worker records in the
unweighted sample.
There are general special tab rules that apply to all tabs, which are
not CTPP specific. For instance, all aggregates and averages require 3
unweighted cases in the CELL. The 5-year data has no lower bound for
place size. There is no rule yet in place for maximum number of cells
per table, a number has been discussed, but not decided upon.
If you have questions please do not hesitate to email them to me.
Thanks in advance for your help!
Penelope Weinberger
CTPP Program Manager
AASHTO
202-624-3556
http://ctpp.transportation.org/home/default.htm
<http://www.transportation.org>
It's just as bad to not make a plan as to blindly follow the one you
already have.