Dear CTPP community: I am passing along an announcement for an Association of Public Data Users (APDU) webinar in which you may be interested. The webinar is open to non-APDU members for a $50 fee. You might also want to consider becoming a member of APDU. http://www.apdu.org/ The last conference (held in September) included an excellent presentation about data.gov, among many useful sessions. The CTPP data access software that is being designed and tested by Beyond 2020 (under contract to AASHTO) will include limited ability to re-calculate standard errors, e.g. when adding geographic units, or adding table cells. Elaine Murakami Webinar: User Needs for Calculating Standard Errors in the ACS October 15, 2010 3pm - 4pm EST Host: Warren Brown, University of Georgia Presenters: Doug Hillmer, Independent Consultant, and Jane Traynham, Maryland State Data Center Description: With the ACS, it is increasingly important that data users pay attention to standard errors. This session is aimed at helping users better understand and calculate those errors. What are the requirements that should be addressed by an online statistical calculator to facilitate users manipulating published tabulations and calculating appropriate measures of reliability? Users needing to calculate the reliability of various estimates-such as differences between geographic areas, differences over time, ratios, and proportions-need to have an online tool that facilitates the process. This webinar is directed at users of the tabulated data from the ACS who have found it necessary to calculate measures of reliability but find the process to be arduous, time consuming, and with a high likelihood of errors. The presenters will share their ideas for the specification of requirements and seek feedback from the webinar participants. Online Registration or register by fax or email here <http://click.icptrack.com/icp/relay.php?r=72024747&msgid=912520&act=ATR 8&c=364653&destination=http%3A%2F%2Fstore.apdu.org%2Fregistration.asp%3F action%3Dregform1%26Event_Id%3D6>