Arbitron Notes Issue In San Francisco eBook
March 29, 2011 at 6:30 AM (PT)
ARBITRON sent a notice to its SAN FRANCISCO clients TODAY (3/29), alerting them to an issue with an "understatement" of cell phone panelists in the DECEMBER 2010 through FEBRUARY 2011 editions of ARBITRON's eBook.
Wrote ARBITRON, "In select instances, the number of Cell Phone panelists may have been understated in the Panelist Phone Status table originally posted in those reports (and were instead labeled in the table as Landline panelists). The Panelist Phone Status table in those reports may therefore have understated ARBITRON's success at including Cell Phone panelists in the sample. Panelist Phone Status information has been appropriately updated for the DECEMBER 2010 through FEBRUARY 2011 editions of SAN FRANCISCO ARBITRON eBook. Audience estimates are not affected for any market or report period in any way."