Ap NORC public affairs center of relevant survey work and retirement of the attitudes of americans age 50 and over, from August 8 to 9 month. 10 NORC at the university of Chicago. It is based on random sampling of 1024 people aged 50 nationally representative landline and cell phone interview. The interview included 815 respondents were fixed on the mobile phone and 209.
The phone number of the digital dial, random generation, to families and private and public fixed telephone and mobile phone number.
Interviewed in English and Spanish.
For regular questionnaire survey, the results of the weighted processing, or adjustment, to ensure that accurately reflect the population response factors, such as age, gender, education level, employment status and racial makeup. In addition, the weight to mobile phone usage patterns - only machine, mobile phone and only two - by region.
No more than 1 second chance 20 samples of change will lead to different results by more than 4.1% positive or negative, will get the answer, if in the United States all adults over the age of 50 were studied.
There are other sources, potential errors in the opinion polls, including the wording and order of the problem.
Sponsored the survey was conducted by the Sloan foundation, which makes the original research grants, extended to support its work procedure, aims to expand the work of the aging of American mode of understanding.