RE: [CTPP] estimating standard errors for 2000 CTPP data

Please remove me from your E-mail list, I retire Dec. 31, 2009 Donald A. Bubb, P.E; Chief Transportation Planning and Traffic Engineering York County Planning Commission 28 E. Market Street I York, Pa. 17401 Phone: 717.771.9870 I Fax: 717.771.9511 www.dbubb@ycpc.org From: ctpp-news-bounces(a)chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Paul Reim Sent: Wednesday, December 30, 2009 11:45 To: CTPP-News Subject: [CTPP] estimating standard errors for 2000 CTPP data I'm compiling some comparisons of 2006-08 ACS and 2000 Census data, and I'm looking for some guidance in estimating standard errors for 2000 CTPP tables. For the place of residence data, I have applied the estimation procedures outlined in the 2000 SF3 documentation: Unadjusted standard error: SE(Y) = sqrt(5*Y*(1-Y/N)), where N = size of publication area (total population) and Y = estimate of characteristic total This value is then multiplied by a design factor determined by the state, sample rate and characteristic. Are these methods also applicable to the workplace (CTPP part 2) tables? If so, what assumptions can I make about sample rates, and are the standard error design factors applicable to place of work statistics? Any advice will be greatly appreciated. ---------------------------------------------------- Paul Reim Chief Planner, Data Resources Central Transportation Planning Staff Boston Metropolitan Planning Organization 10 Park Plaza, Suite 2150 Boston, MA 02116-3968 Phone: (617) 973-8132 Fax: (617) 973-8855