ECON 203 1st Edition Lecture 7 Outline of Last 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 PhasesOutline of Current LectureI. Statistical Inference: Two Population Difference in MeansII. Case 11. The Excel TableIII. Case 21. Tail TestA. Answers2. IntervalCurrent LectureI. Statistical Inference: Two Population Difference in Means- Always assume variances are equal unless it is specified otherwiseII. Case 11. The excel table- Mean = x- Observations = n- Pooled Variance = S²- U1 – U2 = 0III. Case 21. Tail TestThese 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.- Use one sided test because it’s one tailed, so it’s t.05 but when using confident interval do ta/2- Consider the confident interval alpha completely different than the initial 95% confidence interval A. AnswersHo: u1-u2=0 ; u1=u2Ha: u1≠u2 ; u1-u2 ≠0S² = 3,632,605T=1.275T18,.05 = 1.734DNR Ho insufficient evidence to prove Ho[-703.7,2877.7] 2. Interval= point estimate + margin of error Example: -29.21 ± 27.65 = (-56.86,
View Full Document
Unlocking...