Appendix A: Survey methodology
This study, sponsored by Pew Research Center, used online opt-in survey data collected by three commercial vendors. Each vendor provided their own sample and administered the survey themselves, based on a common questionnaire. While no vendor makes the claim that that these are probability-based samples, they are intended to represent the noninstitutionalized U.S. adult population, […]
Published January 26, 2018 at 10:20PM
Read more on pewresearch.org
This study, sponsored by Pew Research Center, used online opt-in survey data collected by three commercial vendors. Each vendor provided their own sample and administered the survey themselves, based on a common questionnaire. While no vendor makes the claim that that these are probability-based samples, they are intended to represent the noninstitutionalized U.S. adult population, […]
Published January 26, 2018 at 10:20PM
Read more on pewresearch.org
Appendix A: Survey methodology
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