Determining sample-size is important step when planning a statistical study. It is also quite a difficult task since many variables must be considered.
MAIN DISCUSSION POST: Due by Saturday
In Yahoo! use the search term "Sample Size Determination." Select a University or Government webpage that discusses the topic. Do not use Wikipedia, eHow or about.com or other resource that is not written or published by a University or the US Government.
Paragraph 1: In simple terms explain what researchers must go through to select the right sample size for a study. (Be sure to cite and reference the website)
In Yahoo! use the search term "Sample Size Calculator." Select two calculators you like best.
Paragraph 2: Explain how the calculators work. Test the two calculators using a population, confidence level and confidence interval you select. Discuss the results. (Be sure to cite and reference the website)
Please do not use quotes or copy definitions. You will not receive credit for understanding the materials if you use the words of others. Keep in mind that since you did research and you have citations in the body of the post, you must also place a reference list at the end containing the textbook and the articles cited.