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I got to thinking about the poll results that have been cited in this thread.  One post includes the phrase, "the results show the public........: According to the method information cited by Professors Henson and Shaw, for their 2010 study, which is now more than four years old, they surveyed 2,000 Texans. It sounds impressive until one reads the fine print and realizes that only 34 per cent of those contacted responded.   Apparently the researchers did not have a substitution strategy for their sampling methodology.  For a statistical sample to be valid, the construct must contain a substitution methodology. That is to say, if a telephone number selected for the sample cannot be contacted, the researchers must add another number and, moreover, change the sample size. Otherwise, they cannot project the results to the population as a whole or claim that the public said. Based on the results of the poll, the results do not show what the public ....... they show what the respondents said. And that is different than claiming what the public said about the subject. Moreover, most researchers know that people who respond to surveys, polls, etc. don't always evidence the characteristics of the population as a whole.  In other words, some folks are more inclined to respond to a telephone poll than others. Busy people frequently tell the pollsters to get lost, or as I do just hang up on them.  Here is the wording from the survey report: (TRA) - Austin - A wide-ranging study conducted by a research group at the University of Texas shows that an overwhelming majority of Texans surveyed......
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