Data Mining 95-791 Spring 2013 Lecture #8 Predictive analytics: Regression Artur Dubrawski awd@cs.cmu.edu This unit • Good-old correlation scores revisited • Locally weighted regression – As an approximator of non-linear functions – As a framework for active/purposive acquisition of data 95-791 Data Mining Lecture #8 Slide 2 Copyright © 2000-2013 Artur Dubrawski Correlational scores of association between attributes of data • • • • Linear Rank Quadratic …. Would not it be
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The First Continental Congress The First Continental Congress was held on September 5‚ 1774‚ at Philadelphia’s Carpenter’s Hall to protest the Intolerable Acts. Benjamin Franklin wanted to hold this meeting earlier‚ but because the Boston Port was closed from the Boston Tea Party‚ not many people supported it. When they actually got started‚ twelve out of the thirteen colonies (Georgia did not) sent some representatives. The sessions were held until late October. All the Americans who supported
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Jason O’Brien PHI/105 May 27‚ 2012 Letter to a Continental Philosopher Dear Jean-Paul Sartre‚ After learning from and studying your philosophical view of man-kind‚ I understand that it is believed by you that because there is no God‚ there are no maker of man and no such thing as a divine conception of man in accordance with which man was created. This is defective for the sole fact that without a God‚ we (as a human) would not be here today. It has always been known the one individual
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UNITED INTERNATIONAL UNIVERSITY ASSIGNMENT ON Airline Industry (International Busuness-606) Submitted To Dr. Enamul Haque School of Business & Economics Submission Date 26th Dec. 2012 Table of Content |Topics |Page No. | |1.Globalization of Airline Industry |3 | |Industry Analysis
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The simple regression model (SRM) is model for association in the population between an explanatory variable X and response Y. The SRM states that these averages align on a line with intercept β0 and slope β1: µy|x = E(Y|X = x) = β0 + β1x Deviation from the Mean The deviation of observed responses around the conditional means µy|x are called errors (ε). The error’s equation: ε = y - µy|x Errors can be positive or negative‚ depending on whether data lie above (positive) or below the conditional
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you cannot consult the regression R2 because (a) ln(Y) may be negative for 0 < Y < 1. (b) the TSS are not measured in the same units between the two models. (c) the slope no longer indicates the effect of a unit change of X on Y in the log-linear model. (d) the regression R2 can be greater than one in the second model. 1 (v) The exponential function (a) is the inverse of the natural logarithm function. (b) does not play an important role in modeling nonlinear regression functions in econometrics
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Testing. Follow the steps shown in the process diagram. You will try out four different models as described below: Regression: This model is the default regression model with the original data Regression – No Model Selection: This is the default regression model after transforming the variables as described below. Regression – Stepwise: This is the Regression model using stepwise regression and transformed data Decision Tree: This is the default decision tree model using transformed data Transform
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Due in class Feb 6 UCI ID_____________________________ MultipleChoice Questions (Choose the best answer‚ and briefly explain your reasoning.) 1. Assume we have a simple linear regression model: . Given a random sample from the population‚ which of the following statement is true? a. OLS estimators are biased when BMI do not vary much in the sample. b. OLS estimators are biased when the sample size is small (say 20 observations)
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Table 1 showed the empirical results of microfinance and poverty reduction through the Tobit regression method of analysis. For this study to evaluate the influence of microfinance on the poverty reduction‚ Tobit regression model was regressed on the poverty reduction‚ on the key variables in this study. These include micro-credit‚ age‚ household size‚ qualification‚ nature of business‚ duration of membership and village type. In this model‚ poverty reduction is a dummy and is considered as the dependent
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When settlers arrived to the nation which would become the United States of America‚ colonies were governed by British colonial rule‚ which was carried out by governors for each colony appointed by the English crown. By 1774‚ each colony had established a Provincial Congress‚ or an equivalent governmental institution‚ to govern itself‚ but the colonies still abided under crown rule. The Kingdom of Great Britain was one of the major participants in the Seven Years’ War which lasted between 1756
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