Sample Size Determination: Explaining the Process
Determining sample-size is important step when planning a statistical study. It is also quite a difficult task since many variables must be considered.
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.
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)