The CB does not recommend comparing an ACS based data set to a CB Long Form based data set.  The 2000 data represent a point in time estimate, the ACS data represent a period estimate.  Furthermore, the Census Bureau recommends not comparing period estimates with overlapping years.

Penelope Weinberger

CTPP Program Manager

AASHTO

202-624-3556

http://ctpp.transportation.org/Pages/default.aspx

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 Seidensticker, Dan
Sent: Friday, January 28, 2011 4:18 PM
To: (ctpp-news@chrispy.net)
Subject: [CTPP] 2000 and 2006-08 work trip comparison question.

We downloaded the2006-2008 ACS county-to-county worker flow for Dane County, Wisconsin from http://ctpp.transportation.org/Pages/3yrdas.aspx.

The question we now have…can that data be compared to the county-to-county 2000 CTPP work trips  to determine any statistically significant increase/decrease?  If so, how would one calculate the margin of error?

Dan Seidensticker
GIS Specialist
Madison Area Transportation Planning Board:

A Metropolitan Planning Organization (MPO)
City of Madison Planning Unit
121 S. Pinckney Street, Suite 400
Madison, WI 53703
Voice: 608-266-9119
Fax: 608-261-9967
Email: dseidensticker@cityofmadison.com
www.MadisonAreaMPO.org