ECON 2500 Lecture Notes - Null Hypothesis, Confidence Interval, Test Statistic

• School: York University
• Department: Economics
• Course: ECON 2500
• Professor: all

Document Summary

Econ 2500 winter 2011 xianghong li. Chapter 6 introduction to inference mar 15. Outliers can have a large effect on the ci. If n is small then you need x to be normal. If n > 15, then underlying distribution can often be different from normal and the sample mean will still be close to normal. 95% confidence interval does say: among all possible samples, the interval will cover the population mean for 95% of the time, note that this interval varies from sample to sample. 95% confidence interval does not say: for 95% of probability, the ci computed from a specific sample has contained the population parameter. A tentative explanation for a phenomenon, used as a basis for further investigation. Under the british common law and those systems derived from it, the defendant is assumed to be innocent before the trial. This evidence takes the form that strives to contradict the presumption of innocence.