US agency Survey Sampling Inc. (SSI), sample consultant and product provider, has been named Supplier of the Year by the Gallup Organization. The award is presented for the highest levels of marketing ...

Survey sampling and estimation methods form the cornerstone of modern statistical inference, underpinning research across the social, medical, and natural sciences. At their heart, these methods ...

Results for this survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International among a nationwide sample of 1,430 adults, 18 years of age ...

Results for this survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International among a nationwide sample of 2,004 adults, 18 years of age ...