Independent topic Speech or Presentation Example | Topics and Well Written Essays - 500 words

Independent topic - Speech or Presentation ExampleIn professional polling the importance of have validity is immeasurable. The first tint is to fully identify the sampling frame from the population that the poll seeks to represent. This is followed by a random selection of a small percentage from within the sampling frame to represent the entire population targeted by that poll. Random here implies that everyone has an equal chance to be selected and this can only be graspd if the method elect to identify individuals to be interviewed is free of bias. Even though Statistics postulates that the actual number of people interviewed for a given sample is less important than the soundness of randomness employed in the process, you still need to balance the economic cost of sample sizes with the desired level of accuracy required. Accuracy of plus or deduction three percentage points margin of error is the acceptable level for professional polls.Once the individual to be interviewed h as been identified it is important not to change the selected mortal so as to eliminate possibility of bias. In the case of telephone sampling this would involve performing call-backs until such a time that selected individual is available. However, to a greater extent importantly for the interview is the wording of the questions and the order in which they are set to be answered. Crafting fair and objective questions requires extensive knowledge of public opinion, care and discipline. To achieve this it is good practice to have exact wording of a question held constant from year to year to analyze trends and also to have multiple questions to facilitate put the research within a certain context. These two practices come in handy when interpreting the poll results. Finally, for accountability purposes the polling company needs to attract its data available to the public domain for any interested parties to draw their own conclusions about what the survey data means and to assess whether the poll was conducted in a professional manner.The New York