ABC News/Washington Post Poll, April 2008

computer-assisted telephone interview (CATI) The data available for download are not weighted and users will need to weight the data prior to analysis. The variables PCTBLACK, PCTASIAN, PCTHISP, MSAFLAG, CSA, CBSA, METRODIV, NIELSMKT, BLOCKCNT, and ZIP were converted from character variables to numeric. To preserve respondent confidentiality, codes for the variables FIPS (FIPS County) and ZIP (ZIP Code) have been replaced with blank codes. System-missing values were recoded to -1. The CASEID variable was created for use with online analysis. Value labels for unknown codes were added in variables MSA, CSA, CBSA, and METRODIV. The variable CBSA contains diacritical marks. The data collection was produced by Taylor Nelson Sofres of Horsham, PA. Original reports using these data may be found via the ABC News Polling Unit Web site and via the Washington Post Opinion Surveys and Polls Web site. Variables MSA, CSA, and CBSA contain values for which there are no known codes.计算机辅助电话调查（computer-assisted telephone interview, CATI）：本次可下载的数据集未经过加权处理，使用者需在开展分析前对数据进行加权操作。PCTBLACK、PCTASIAN、PCTHISP、MSAFLAG、CSA、CBSA、METRODIV、NIELSMKT、BLOCKCNT及ZIP等变量已从字符型变量转换为数值型变量。为保护受访者隐私，变量FIPS（FIPS County）与ZIP（ZIP Code）的编码已被替换为空编码。系统缺失值已被重编码为-1。CASEID变量专为在线分析场景创建。已为MSA、CSA、CBSA及METRODIV变量中的未知编码添加取值标签。CBSA变量中包含变音符号。本次数据采集由宾夕法尼亚州霍舍姆的泰勒纳尔逊索夫雷斯公司（Taylor Nelson Sofres）完成。使用本数据集撰写的原始报告可通过美国广播公司新闻民意调查部官网，以及《华盛顿邮报》民意调查与舆情调研官网获取。MSA、CSA及CBSA变量中包含暂无已知编码的取值。