Gallup also noted <ref> http://media.gallup.com/PDF/FAQ/HowArePolls.pdf </ref> that insufficient sample size, the random selection technique used in creating the sampling frame and the execution of the sample were important standard and primary caveats. | Gallup also noted <ref> http://media.gallup.com/PDF/FAQ/HowArePolls.pdf </ref> that insufficient sample size, the random selection technique used in creating the sampling frame and the execution of the sample were important standard and primary caveats. |