Homework 4 - sampling and confidence intervals important PDF

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sampling and confidence intervals important...

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EPPS 2302 – Methods of Quantitative Analysis in the Social and Policy Sciences Homework Number 4 Due by 5:00 PM on Mar. 8, 2021 Answer each of the following questions with a few lines of text. Put your answers into a Microsoft Word document, and email the document to me ([email protected]) by the due date/time. (1) Successful sampling studies produce narrow confidence intervals (i.e., intervals where the difference between the upper and lower bounds is small), while less successful studies produce wide intervals (i.e., intervals where the difference between the upper and lower bounds is large). Why are narrow confidence intervals considered key to the success of sampling studies? (2) When constructing a confidence interval about the population mean, some of the values you plug into the formula are out of your control (e.g., you can’t change the sample mean produced by your study; the sample mean is whatever your sample data says it is). However, there is one value that you can control that can have a major impact on the width of the confidence intervals produced by your study. What value is that, and how can you adjust it to produce narrower confidence intervals?...