You have been hired by the County of Sacramento to estimate the percentage of registered voters that favor issuing a bond in order to finance the construction of a new bike trail along the Sacramento River. You want no more than a ±
4 percentage point error margin, at the 95% confidence level. How would you conduct such a survey using a simple random sample?
uWhen going over your sampling design with the county Parks Director, you are asked whether you think a stratified sample would be appropriate? What is your reply? Why? uWhat about a systematic sample?
[此贴子已经被作者于2008-7-8 6:13:07编辑过]
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