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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1Chapter 1 - A boss by definition usually has position power over subordinates. True - A factor common to the leadership classification systems is the view of leadership as a process of influence. True - According to Burns‚ followers should remember that their leaders are above them and act accordingly. False - An individual perceived by other group members as influential can only be an assigned leader‚ not an emergent one. False - Followers usually are responsible for maintaining the relationship
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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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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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3.2.3 The Stepwise Regression Analyses Table 4 and 5 showed the result of multiple regression analysis of critical thinking (CT) and speaking Skill (SS) achievement. The correlation among the Debate and context‚ issue‚ implication‚ and assumption was 0.923 or 92.3% and the influence of contribution of the whole aspects of critical thinking (CT) was 0.821 or 82.1%. Partially‚ the contribution of each aspect of critical thinking (CT) toward critical thinking (CT) achievement was as follows: context
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CHAPTER 13 CORRELATION AND REGRESSION ANALYSIS OUTLINE 4.1 Definition of Correlation Analysis 4.2 Scatter Diagram and Types of Relationships 4.3 Correlation Coefficient 4.4 Interpretation of Correlation Coefficient 4.5 Definition of Regression Analysis 4.6 Dependent and Independent Variables 4.7 Simple Linear Regression: Least Squares Method 4.8 Using the simple Linear Regression equation 4.9 Cautionary Notes and Limitations OBJECTIVES By the end
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MATH 231: Basic Statistics Homework #5 – Correlation and Regression: 1). Bi-lo Appliance Super-Store has outlets in several large metropolitan areas in New England. The general sales manager aired a commercial for a digital camera on selected local TV stations prior ro a sale starting on Saturday and ending on Sunday. She obtained the information for Saturday-Sunday digital camera sales at the various outlets and paired it with the number of times the advertisement was shown on local TV stations
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Time Series Regression 3.1 A small regional trucking company has experienced steady growth. Use time series regression to forecast capital needs for the next 2 years. The company’s recent capital needs have been: ══════════════════════════════════════════════ Capital Needs Capital Needs (Thousands Of (Thousands Of Year Dollars) Year Dollars) -------------------------------------------
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S CHOOL OF M ATHEMATICS ‚ S TATISTICS AND O PERATIONS R ESEARCH STAT 392 Tutorial – Ratio and Regression Estimation 1. Regression Estimation (from Lohr‚ Ex 3.6.4) Foresters want to estimate the average age of tress in a stand. Determining age is cumbersome because one needs to count the tree rings on a core taken from the tree. In general‚ though‚ the older the tree‚ the larger the diameter‚ and diameter is easy to measure. The foresters measure the diameter of all 1132 tress and find that
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1. When a company expands its sales volume through international expansion‚ it can realize cost savings from economies of scale through all of the following except a. spreading fixed costs over its global sales volume. b. utilizing its production facilities more intensely. c. increased bargaining power with its suppliers. d. learning effects associated with higher volume. e. improved responsiveness. 2. The ability to realize cost economies from global volume is greatest in the
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