The aim of the survey was the evaluation of specific nourishment habits among 14-16 year-old teenagers of a different physical activity in the north-eastern Poland on the example of Sokolski district. The 14-16-year teenagers from secondary school, in Sokolski district (368 boys and 368 girls) were examined. They were chosen at random. The researches were carried out from November to December i...

Panel studies typically suffer from attrition, which reduces sample size and can result in biased inferences. It is impossible to know whether or not the attrition causes bias from the observed panel data alone. Refreshment samples—new, randomly sampled respondents given the questionnaire at the same time as a subsequent wave of the panel—offer information that can be used to diagnose and adjus...

This article presents the process of adaptation and validation, resulting psychometric properties, “Questionnaire Barriers Perceived” (QBP). The scale identifies whether a student’s perceptions expectations are mediated by stereotypes or roles associated with gender through study their professional aspirations, fear negative judgement, perceptions/awareness men women. Two descriptive studies we...

The supposed failure of privatization in Latin America has recently become the source of street riots, protest demonstrations, and adverse news coverage. Riots in Arequipa, Peru, erupted in June 2002 following the announcement of a proposal to privatize power plants, while Cochabamba, Bolivia, witnessed a so-called water war in April 2000. Antiprivatization protests also occurred recently in Ec...

It is known that Hough Transform computation can be signiicantly accelerated by polling instead of voting. A small part of the data set is selected at random and used as input to the algorithm. The performance of these Proba-bilistic Hough Transforms depends on the poll size. Most Probabilistic Hough algorithms use a xed poll size, which is far from optimal since conservative design requires th...

Fuzzy models to recognize consumer preferences were developed as part of an automated inspection system for biscuits. Digital images were used to estimate physical features of chocolate chip cookies including size, shape, baked dough color, and fraction of top surface area that was chocolate chips. Polls were conducted to determine consumer ratings of cookies. Four fuzzy models were developed t...

This paper examines the costs and benefits of using first-class postage compared to non-profit, pre-canceled postage in inducing response to a self-administered mail questionnaire. An experiment was conducted with the outgoing postage for the 1998 Nebraska Rural Poll. Twenty-five percent of the outgoing questionnaires were mailed with first-class postage, with the remaining seventy-five percent...