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Stat 104 - RoadmapIntro•Population vs. sample•Parameters vs. statisticsBasic Probability•Marginal prob.•Conditional probability•Laws of probability•Probability tablesDescriptive Stats•Central tendency•Variability•Relative standing•2 variable statsGraphs•Dotplots and HistogramsDataDiscrete Distributions•Random variable•E[X], Var[X] & Laws of expectation•Binomial•Joint distributionsEstimation•Point estimators•Confidence intervals•Levels of confidence: ! " #Central Limit Theorem•$2%&'() *+,-.•/3%&0)45641Continuous Distributions•Density functions•Uniform distribution•Normal distribution•T-distributionInferenceAnalysisLinear Regression•Least squares lines: scatterplot•Multivariate regression•Dummy variables: 0/1•Regression DiagnosticsHypothesis Testing•Testing parameters: mu and pi•Left tailed, right tailed, two-tailed•Rejection regions approach•P-values•Levels of significance•Type I and Type II errorsTwo Sample Tests•Compare mean across two populations•Compare two proportions!"Stat 104: Quantitative Methods for EconomistsClass 1: The Nature of Statistics#+LVWRULFDO 4XRWHVStatistics ... "the most important science in the whole world: for upon it depends the practical application of every other science and of every art; the one science essential to all political and social administration, all education, all organization based upon experience, for it only gives the results of our experience." Florence Nightingale"Statistical thinking will one day be as necessary for efficient citizenship as the ability to read and write.“-H.G. Wells1$QG \RX ZDQW WR EH P\ ODWH[ VDOHVPDQ";:KHUH $P ,"Michael Parzen: Sci 300bPhone: 617-495-8711Email: [email protected]?:KR $P ,"@7KH 3ULPDU\ 7HDFKLQJ 6WDII!Me (well duh): [email protected]"Feel free to contact me for any problems/concerns/anything about the course/life.!Department Preceptor Mayumi M. Fleshler"She deals with students with special needs and course emergencies. [email protected]!Head Teaching Fellow (TF) TBA"Kaitlin Hagan, Phd student at HSPH In charge of sections and all the course teaching fellows. [email protected]F7HDFKLQJ 6WDII +LHUDUFK\ParzenMayumi Fleshler(Preceptor)(head TF)Assigned TFG&RXUVH :HEVLWH•Course website:••There you will find:•Syllabus•Administrative Announcements•Lecture Notes•Stata Tutorial•Assigned Homeworks•Other Study Material (old exams, web links, etc...)!I&RXUVH ,QWHQW!Overcome Math Anxiety. !Learn skills for other courses and the workplace (no Las Vegas Syndrome).!Use statistical tools to identify problems and opportunities. Learn techniques which help you make decisions.