16 Feb
2013
16 Feb
'13
12:57 p.m.
Do we have a metric for useless? I have seen published data where the MOE is more than
85% of the estimate. Is this useless? What if the MOE is only 10% of the estimate.
Anyone using any standards for what is considered useless. Also, at what point should
this determination be put in the hands of the user/analyst?
Ed C
On Feb 15, 2013, at 9:33 PM, Patricia Becker <pbecker(a)umich.edu> wrote:
Brian,
Tell me something. Do you want to use these data for individual block groups or do you
want to aggregate BGs to larger areas, such as TAZs? I hope you know that the sampling
errors for single BG data are so high as to render the data absolutely useless. I think
that's why you can't find the numbers.
Patty Becker
On Fri, Feb 15, 2013 at 3:35 PM, Brian Chenault <bchenault(a)hrtpo.org> wrote:
Hello,
Brian Chenault from the Hampton Roads Transportation Planning Organization here. We are
trying to collect several pieces of data at the block group level using 2007-2011 ACS
5-year estimates. Using the Census’ Summary File Excel Retrieval Tool, we are able to
retrieve basic population data at the block group level. However, data at the block group
level is not provided for poverty, language spoken at home, etc. This appeared to be the
case even when examining 2006-2010/2005-2009 5-year estimates. Has this information not
been “filtered down” from the census tract level yet? How is one supposed to go about
gathering this type of updated information at the block group level?
Much appreciated,
Brian
<image001.png>
Brian Chenault
Community Outreach Planner
Hampton Roads Transportation Planning Organization
The Regional Building | 723 Woodlake Drive | Chesapeake, Virginia | 23320
bchenault(a)hrpdcva.gov | http://www.hrtpo.org | Phone: 757.420.8300 | Fax: 757.523.4881
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--
Patricia C. (Patty) Becker
APB Associates/Southeast Michigan Census Council (SEMCC)
28300 Franklin Rd, Southfield, MI 48034
office: 248-354-6520
home:248-355-2428
pbecker(a)umich.edu
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