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UIUC ECON 203 - Statistical Inference: Two Population

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ECON 203 1st Edition Lecture 6 Outline of Last LectureI. Statistical Inference: Single Population Variance1. Data Set2. When to use variance3. Transformation4. Chi-Squared5. Example slide 8 page 466. P-Value7. Example slide 11 page 48Outline of Current LectureI. Statistical Inference: Two Population Mean, Proportion & Variance1. Single PopulationA. X ²II. Case 1: The Two Population Variance Values Are Known1. Facts About Paragraph #12. Facts About Paragraph #2A. Going Through PhasesCurrent LectureI. Statistical Inference: Two Population Mean, Proportion & Variance1. Single PopulationA. X²  Does Obama have majority support? Is this stock risky?II. Case 1: The two population variance values are known (pg. 52)1. Facts about paragraph #1- Of independent population 2 formula- “Previous studies” = we know this is true- Since standard deviations are known, then the variance is also known- Since there is no matching, it must be independent2. Facts about paragraph #2- Always assume 95% confidence when it’s not statedThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.A. Going Through Phaseso Ho: u1 = u2, Ha: u1 ≠u2o Z = 3.876o Z.025 = 1.96o Reject Ho, we have proven that the number of days differ between


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