نتایج جستجو برای: polls data
تعداد نتایج: 2411043 فیلتر نتایج به سال:
It is well known among researchers and practitioners that election polls su↵er from a variety of sampling and non-sampling errors, often collectively referred to as total survey error. Reported margins of error typically only capture sampling variability, and in particular, generally ignore non-sampling errors in defining the target population (e.g., errors due to uncertainty in who will vote)....
All electoral systems have an electoral formula that converts proportions of votes into Parliamentary seats.Pre-electoral polls usually focus on estimating proportions of votes and then apply the electoral formula to give a forecast of Parliamentary composition. We describe the problems that arise from this approach: there will typically be a bias in the forecast. We study the origin of the bia...
In this paper we model the concept of ”coarseness”, typically used in texture image descriptions, by means of fuzzy sets. Specifically, we relate representative measures of this kind of texture with its presence degree. To obtain these ”presence degrees”, we collect assessments from polls filled by human subjects, performing an aggregation of these assessments by means of OWA operators. Using t...
By comparing data from national telephone polls to Census gures on household size (number of adults in household), we nd large diierences between population and sample, even after weighting respondents proportional to household size. This presumably occurs because larger households are easier to reach and more likely to respond to the survey. If a user wishes to weight on household size, we rec...
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