REGRESSION ANALYSIS Correlation only indicates the degree and direction of relationship between two variables. It does not, necessarily connote a cause-effect relationship. Even when there are grounds to believe the causal relationship exits, correlation does not tell us which variable is the cause and which, the effect. For example, the demand for a commodity and its price will generally be found to be correlated, but the question whether demand depends on price or vice-versa; will not be answered...
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Regression Analysis (Tom’s Used Mustangs) Irving Campus GM 533: Applied Managerial Statistics 04/19/2012 Memo To: From: Date: April 19st, 2012 Re: Statistic Analysis on price settings Various hypothesis tests were compared as well as several multiple regressions in order to identify the factors that would manipulate the selling price of Ford Mustangs. The data being used contains observations on 35 used Mustangs and 10 different characteristics. The test hypothesis that...
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Project Regression Analysis for the pricing of players in the Indian Premier League Executive Summary The selling price of players at IPL auction is affected by more than one factor. Most of these factors affect each other and still others impact the selling price only indirectly. The challenge of performing a multiple regression analysis on more than 25 independent variables where a clear...
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Introduction This presentation on Regression Analysis will relate to a simple regression model. Initially, the regression model and the regression equation will be explored. As well, there will be a brief look into estimated regression equation. This case study that will be used involves a large Chinese Food restaurant chain. Business Case In this instance, the restaurant chain's management wants to determine the best locations in which to expand their restaurant business. So far the most...
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MATH533: Applied Managerial Statistics PROJECT PART C: Regression and Correlation Analysis Using MINITAB perform the regression and correlation analysis for the data on SALES (Y) and CALLS (X), by answering the following questions: 1. Generate a scatterplot for SALES vs. CALLS, including the graph of the "best fit" line. Interpret. After interpreting the scatter plot, it is evident that the slope of the ‘best fit’ line is positive, which indicates that sales amount varies directly...
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Linear Regression deals with the numerical measures to express the relationship between two variables. Relationships between variables can either be strong or weak or even direct or inverse. A few examples may be the amount McDonald’s spends on advertising per month and the amount of total sales in a month. Additionally the amount of study time one puts toward this statistics in comparison to the grades they receive may be analyzed using the regression method. The formal definition of Regression Analysis...
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QUANTITATIVE METHODS:- Quantitative methods of forecasting include ASSOCIATIVE (CAUSAL) MODELS:- There is a causal relationship between the variable to be forecast and another variable or a series of variables. (Demand is based on the policy, e.g. cement, and build material. Causal Model: Demand for next period = f (number of permits, number of loan application....) There is no logical link between the demand in the future and what has happened in the past. There are other factors which can...
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Regression Analysis Exercises 1- A farmer wanted to find the relationship between the amount of fertilizer used and the yield of corn. He selected seven acres of his land on which he used different amounts of fertilizer to grow corn. The following table gives the amount (in pounds) of fertilizer used and the yield (in bushels) of corn for each of the seven acres. |Fertilizer Used |Yield of Corn | |120...
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Eleven Multivariate Analysis Techniques: Key Tools In Your Marketing Research Survival Kit by Michael Richarme Situation 1: A harried executive walks into your office with a stack of printouts. She says, “You’re the marketing research whiz—tell me how many of this new red widget we are going to sell next year. Oh, yeah, we don’t know what price we can get for it either.” Situation 2: Another harried executive (they all seem to be that way) calls you into his office and shows you three proposed...
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STA9708 Regression Analysis: Literacy rates and Poverty rates As we are aware, poverty rate serve as an indicator for a number of causes in the world. Poverty rates are linked with infant mortality, education, child labor and crime etc. In this project, I will apply the regression analysis learned in the Statistics course to study the relationship between literacy rates and poverty rates among different states in USA. In my study, the poverty rates will be the independent variable (x) and literacy...
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Important EXERCISE 27 SIMPLE LINEAR REGRESSION STATISTICAL TECHNIQUE IN REVIEW Linear regression provides a means to estimate or predict the value of a dependent variable based on the value of one or more independent variables. The regression equation is a mathematical expression of a causal proposition emerging from a theoretical framework. The linkage between the theoretical statement and the equation is made prior to data collection and analysis. Linear regression is a statistical method of estimating...
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Logistic regression In statistics, logistic regression, or logit regression, is a type of probabilistic statistical classification model.[1] It is also used to predict a binary response from a binary predictor, used for predicting the outcome of acategorical dependent variable (i.e., a class label) based on one or more predictor variables (features). That is, it is used in estimating the parameters of a qualitative response model. The probabilities describing the possible outcomes of a single...
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How to Analyze the Regression Analysis Output from Excel In a simple regression model, we are trying to determine if a variable Y is linearly dependent on variable X. That is, whenever X changes, Y also changes linearly. A linear relationship is a straight line relationship. In the form of an equation, this relationship can be expressed as Y = α + βX + e In this equation, Y is the dependent variable, and X is the independent variable. α is the intercept of the regression line, and β is the...
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Mortality Rates Regression Analysis of Multiple Variables Neil Bhatt 993569302 Sta 108 P. Burman 11 total pages The question being posed in this experiment is to understand whether or not pollution has an impact on the mortality rate. Taking data from 60 cities (n=60) where the responsive variable Y = mortality rate per population of 100,000, whose variables include Education, Percent of the population that is nonwhite, percent of population that...
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Effect of Ratio Profitability: Return on Asset (ROA) and Return of Equity (ROE) to Stock Price of PT Bank Central Asia (BCA) Tbk. Ratio profitability, Return on Asset (ROA) and Return of Equity (ROE), of a firm is used as one of parameters for investor to decide whether they want to invest or not. The following table consists of ROA and ROE as well as the stock price of PT Bank Central Asia (BCA) Tbk., as one of the largest bank in Indonesia, from year of 2002 up to 2011. Table 1. ROA, ROE...
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Forecasting Models: Associative and Time Series Forecasting involves using past data to generate a number, set of numbers, or scenario that corresponds to a future occurrence. It is absolutely essential to short-range and long-range planning. Time Series and Associative models are both quantitative forecast techniques are more objective than qualitative techniques such as the Delphi Technique and market research. Time Series Models Based on the assumption that history will repeat...
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Project 1: Linear Correlation and Regression Analysis Gross Revenue and TV advertising: Pfizer Inc, along with other pharmaceutical companies, has begun investing more promotion dollars into television advertising. Data collected over a two year period, shows the amount of money Pfizer spent on television advertising and the revenue generated, all on a monthly bases. |Month |TV advertising |Gross Revenue | |1 |17 |4.1 | |2 ...
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Park University Multiple Regression Analysis Pamela Lima EC315 Quantitative Research Methods Dr. Bell 11/22/2013 Multiple Regression Analysis Miami Heat Average Attendance per season Miami Heat History The Miami Heat is a professional basketball team, based in Miami, Florida. The team is a member of the Southwest Division in the Eastern Conference of the National Basketball Association (NBA). The Miami Arena was the home of the Heat until the end of the 1999. The American...
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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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------------------------------------------------- Simple regression and correlation Submitted by Sohaib Roomi Submitted to:Miss Tahreem Roll No M12BBA014 Simple Regression And Correlation Introduction The term regression was introduced by the English biometrician, Sir Francis Galton (1822-1911) to describe a phenomenon in which he observed in analyzing the heights of children and their parents. He solved a tendency toward the average height of all men. Today, the word “Regression” is used in quiet different sense...
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might advertise your study and wait for people who have read your ad to come forward to take part * how generalizable are data? * Q: are the means for our sample approximately equal to the mean from the population? * randomly selected sample because of this random factor, sample may not be exactly representative * sampling error * the difference between the sample mean and the population mean * ensure that you have enough participants so that you...
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Regression Analysis: A Complete Example This section works out an example that includes all the topics we have discussed so far in this chapter. A complete example of regression analysis. PhotoDisc, Inc./Getty Images A random sample of eight drivers insured with a company and having similar auto insurance policies was selected. The following table lists their driving experiences (in years) and monthly auto insurance premiums. Driving Experience (years) Monthly Auto Insurance Premium 5 2 12 9...
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TABLE OF CONTENTS I. Forecasting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 A. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 B. Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 C. Importance of Forecasting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Product Life Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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Assignment # 1 Forecasting (Total marks: 100) Following 10 Problems are for submission Problem 1: [12] Registration numbers for an accounting seminar over the past 10 weeks are shown below: |Week 1 2 3 4 5 6 7 8 9 10 | |Registrations 24 23 28 30 38 32 36 40 44 40 | a) Starting with week 2 and ending with...
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Gender Discrimination: A Statistical Analysis Gender discrimination, or sex discrimination, may be characterized as the unequal treatment of a person based solely on that person's sex. . It is apparent that gender discrimination is pervasive in the modern workplace, however, its presence and effects are often misrepresented and misunderstood. Statistical testing plays an important role in cases where the existence of discrimination is a disputed issue and has been used extensively to compare expected...
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Making Decisions Based on Demand and Forecasting Greg Wells Professor Dr. E.T. Faux Managerial Economics and Globalization October 20, 2012 1. Report the demographic and independent variables that are relevant to complete a demand analysis providing a rationale for the selection of the variables. The independent variables for this report will be population, average income per household, age of population, and the price of pizza. A key determinant...
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| |15,000 |1,500 | |52,000 |6,000 | Answer the following questions: A. What kind of correlation do you expect to find between annual income and amount spent on car? Will it be positive or negative? Will it be a strong relationship? Base your answer on your personal guess as well as by looking through the data. The annual income and amount of money spent on a car correlates that generally the greater...
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contrast various forecasting methods while also elaborating on the method that my current employer use for forecasting sales and mobile identification number (MDN) requirements. Forecasting Assignment Forecasting is the ability to plan ahead for future expectations of what the future may hold. For example, business forecast every year for what they feel that particular company should accomplish. A sales department forecasts how many sales not only the department should do as a hole but how many sales...
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MULTIPLE REGRESSION ANALYSIS USING DUMMY VARIABLE HDI Regression Using Health, Education &Income 3/21/2012 Department Of Business Economics Jasmine Kaur(598) Kshama (577) Maanya Kaushik ShikhaChaurasia(600) ABSTRACT In this project we have employed tools of empirical econometric analysis to examine the relationship between the Human Development Index and the indicators of Human Development. Table of contents Topics...
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Regression Analysis: Predicting for Detroit Tigers Game Managerial Economics BSNS 6130 December 13, 2012 By: Morgan Thomas Chad Goodrich Jake Dodson Austin Burris Brittany Lutz Abstract As there are many who invest in athletic events, the ability to better predict attendance to such events, such as the Detroit Tigers games, could benefit many. The benefits include being able to better stock concessions stands, allocate advertising budgets, and staff security. Therefore, the aim...
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Data Analysis The first question of the set of 15 questions was about the age limit of the respondents. We collected all data from the age group starting from 15years. Most of the respondents fall into the age limit of 16-25 years which is 54% of the total respondents. 18of the 50 respondents were 26-35 years of age which is 36%. [pic] [pic] Q1: your most preferable Schemes when you are Thinking about a savings account? This was the question that gives the critical information...
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Forecasting Methodology Forecasting is an integral part in planning the financial future of any business and allows the company to consider probabilities of current and future trends using existing data and facts. Forecasts are vital to every business organization and for every significant management decision. Forecasting, according to Armstrong (2001), is the basis of corporate long-run planning. Many times, this unique approach is used not only to provide a baseline, but also to offer a prediction...
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about basic relationships between variables. For example; could height be related to weight? The report must include: 1. 2. 3. 4. Introduction Methodology Data Analysis Result and Conclusion 1.0 Introduction In your introduction section, you should have a briefly introduction about the background of your research. 2.0 Methodology 2.1 Collecting Data Collecting data can be in two ways; get data from your experiment in the lab and do survey! So what you should have in your data? Your variable must be...
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two other questions 1. COMPULSORY Provide brief answers to all the following: (a) A sample of 20 observations corresponding to the model: Y = + X + u, gave the P P P following data: (X X)2 = 215:4, (Y Y )2 = 86:9, and (X X)(Y Y ) = 106:04. Estimate . (5 marks) (b) Prove that r2 = byx bxy , where byx is the least-squares (LS) slope in the regression of Y on X , bxy is the LS slope in the regression of X on Y , and r is the coe¢ cient of correlation between X and Y . (5 marks) (c) Present four alternative...
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Simple Linear Regression in SPSS 1. STAT 314 Ten Corvettes between 1 and 6 years old were randomly selected from last year’s sales records in Virginia Beach, Virginia. The following data were obtained, where x denotes age, in years, and y denotes sales price, in hundreds of dollars. x y a. b. c. d. e. f. g. h. i. j. k. l. m. 6 125 6 115 6 130 4 160 2 219 5 150 4 190 5 163 1 260 2 260 Graph the data in a scatterplot to determine if there is a possible linear relationship. Compute and interpret...
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Forecasting Business forecasting is the process of studying historical performance for the purpose of using the information gained to project future business conditions so that decisions can be made today that will assist in the achievement of certain goals. Forecasting involves taking historical date and using it to project future data with a mathematical model. Forecasts are extensively used to support business decisions and direct the work of operations managers. In this paper I will introduce...
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evaluation. This assignment illustrates, at a rudimentary level, how models, techniques and methods constructed or borrowed from Economic Theory or other Sciences respectively are used to help accomplish these tasks. To do so, we consider a standard theoretical model of consumer choices in an economy in which the only activity is the exchange of goods. Due to the above-mentioned we can say that the most powerful technique used to predict the consequences of policies or future trends is modeling...
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SECTION A (You should attempt all 10 questions) A1. Regression analysis is ____________________________________. A) describes the strength of this linear relationship. B) describes the mathematical relationship between two variables. C) describes the pattern of the data. D) describes the characteristic of independent variable. A2. __________________ is used to illustrate any relationship between two variables. A) Histogram B) Pie chart C) Scatter diagram D) Frequency...
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order to test my economic model, I have compiled data for each of the variables specified in the model from the years 2003 to 2005. The question that I will be answering in my regression analysis is whether or not wins have an affect on attendance in Major League Baseball (MLB). I want to know whether or not wins and other variables associated with attendance have a positive impact on a team's record. The y variable in my analysis is going to be attendance for each baseball team. I collected the...
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Assignment Week 1 Answer the following questions: 1. Describe the rationale for utilizing probability concepts. For practical reasons, variables are observed to collect data. The sampled data is then analyzed to elicit information for decision making in business and indeed in all human endeavors. However, sampled information is incomplete and not free from sampling error. Its use in decision-making processes introduces an element of chance. Therefore, it is important for a decision-maker...
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Data analysis is an attempt by the researcher to summarize collected data either quantitative or qualitative. Generally, quantitative analysis is simply a way of measuring things but more specifically it can be considered as a systematic approach to investigations. In this approach numerical data is collected or the researcher transforms collected or observed data into numerical data. It is ideal for finding out when and where, who and what and any relationships and patterns between variables. This...
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Consumer Research, Inc. is investigating whether there is any correlation between specific characteristics of credit card users and the amount these users charge on credit cards. Their objective is to determine if these characteristics can accurately predict the annual dollar amount charged by credit card users. Data was collected from a sample of 50 credit card consumers presenting information on the annual income (referred as Income), size of household (referred as Household), and the annual...
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Ms Excel Simple Statistics with Excel and Minitab Elementary Concepts in Statistics Multiple Regression ANOVA Elementary Concepts in Statistics Overview of Elementary Concepts in Statistics. In this introduction, we will briefly discuss those elementary statistical concepts that provide the necessary foundations for more specialized expertise in any area of statistical data analysis. The selected topics illustrate the basic assumptions of most statistical methods and/or have been...
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REGRESSION ANALYSIS (SIMPLE LINEAR REGRESSION) Submitted By Maqsood Khan MS - MANAGEMENT SCIENCES, 2nd SEMESTER Submitted TO GOHAR REHMAN ASSISTANT: PROFESSOR, SUIT Sarhad University Of Science And Information Technology Peshawar SESSION: 2012-13 TABLE OF CONTENTS |S. No. |Subjects |Page No. | |1 | |Introduction ...
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of the 1990s. Total vehicle sales reached an all-time high of 605,156 units in 2010, surpassing the previous highs of 548,115 units in 2008 and 536,905 units in 2009. Total vehicle sales in 2011 were 600,123 units. This forecasting model is looking into the relationship between the sales of passenger car in Malaysia with the unemployment rate. The unemployment rate can be defined as the number of people actively looking for a job divided by the labor force. Changes in unemployment depend mostly...
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Regression Analysis is a very effective quantitative forecasting technique for short, medium and long range time horizons and can be easily updated and changed. Regression Analysis: presupposes that a linear relationship exists between one or more independent (casual) variables, which are predicted to affect the dependent(target) variable. Linearity: The observed relationship between the independent and dependent variables Example: A HR can use regression analysis to predict the number of personnel...
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To address these challenges, forecasting is used. According to Makridakis (1989), forecasting future events can be characterized as the search for answers to one or more of the following questions: X What new economic, technical, or sociological forces is the organization likely to face in both the near and long term? X When might these forces impact the firm¡¦s objective environment? X Who is likely to be first to adapt to each competitive challenge? X How much change should the firm anticipate...
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Regression Analysis (First Mid-term Exam) 10/25/2012 i.i.d. 1. Consider the model Yi =β 0 + β1 xi2 + ε i , ε i ~ N (0, σ 2 ) . (a) (12%) Write down the normal equation and find the least squares estimators of β 0 and β1 . (b) (9%) Define ei , and show that ∑e i = 0 . Is it necessarily true that i ∑e x i i = 0 ? Why i or why not? (c) (5%) Find an estimator of σ 2 . What is the degree of freedom associated with the estimator? i.i.d. 2. Given that Yi =β 0 + β1 xi + ε i , ε i ~ N (0, σ 2...
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How to validate root causes in a lean sigma approach Silvia Pederzolli Milan, the 15th of april 2013 attivaRes Define Opportunities Measure Performance Analyze Opportunity Improve Performance Control Performance CCR’S Objective • • • • • Identify problem statement: what is wrong and why. Deviation from what is expected (targeted performance). How much/how often Effects on Customers. Find and validate the root causes that assure the elimination of “real” root causes. ...
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Formula Study Guide MISCELLANEOUS, COMMONLY USED FORMULAS Finite population correction factor: Multiply SE of sample mean by fpc to make the correction ------------------------------------------------- Independent samples of same population with same standard deviation (variances are equal). Confidence interval: df for t-multiple is (df1 + df2), or (n1 – 1) + (n2 - 1) Pooled estimate of common standard deviation: SE of difference between two sample means ------------------------------------------------- ...
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Tourism Research, Vol. 29, No. 1, pp. 257–260, 2002 2001 Elsevier Science Ltd. All rights reserved. Printed in Great Britain 0160-7383/01/$22.00 Push and Pull Relationships Seong-Seop Kim Sejong University, South Korea Choong-Ki Lee Dongguk University, South Korea Uysal and Jurowski (1994) found that there is a relationship between push and pull factors. Dann (1977) referred to motivational inﬂuences on an individual as push factors. These are psychological needs which play a signiﬁcant role...
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1 CORRELATION & REGRESSION 1.0 Introduction Correlation and regression are concerned with measuring the linear relationship between two variables. 1.1 Scattergram It is not a graph at all, it looks at first glance like a series of dots placed haphazardly on a sheet of graph paper. The purpose of scattergram is to illustrate diagrammatically any relationship between two variables. (a) If the variables are related, what kind of relationship it is, linear or nonlinear...
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Quick Stab Collection Agency: A Regression Analysis Gerald P. Ifurung 04/11/2011 Keller School of Management Executive Summary Every portfolio has a set of delinquent customers who do not make their payments on time. The financial institution has to undertake collection activities on these customers to recover the amounts due. A lot of collection resources are wasted on customers who are difficult or impossible to recover. Predictive analytics can help optimize the allocation of...
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Statistical Analysis for Quick Stab Collection Agency Executive Summary The purpose of the paper is to provide a statistical analysis of overdue bills for Quick Stab Collection Agency (QSCA). The data will be taken from accounts closed over a six month period. The goal is to determine if a correlation between the type of account, the amount of the bill and the days to collection exists. To determine the existence of a correlation, regression analysis of several variables was completed. This...
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What is causal-comparative research? Also known as “ex post facto” research. (Latin for “after the fact”). In this type of research investigators attempt to determine the cause or consequences of differences that already exist between or among groups of individuals.Causal-comparative research is an attempt to identify a causative relationship between an independent variable and a dependent variable. The relationship between the independent variable and dependent variable is usually a suggested...
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MULTIPLE REGRESSION After completing this chapter, you should be able to: understand model building using multiple regression analysis apply multiple regression analysis to business decision-making situations analyze and interpret the computer output for a multiple regression model test the significance of the independent variables in a multiple regression model use variable transformations to model nonlinear relationships recognize potential problems in multiple...
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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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VERSUS MULTIPLE REGRESSION The difference between simple and multiple regression is similar to the difference between one way and factorial ANOVA. Like one-way ANOVA, simple regression analysis involves a single independent, or predictor variable and a single dependent, or outcome variable. This is the same number of variables used in a simple correlation analysis. The difference between a Pearson correlation coefficient and a simple regression analysis is that whereas the correlation does not distinguish...
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Introduction to Linear Regression and Correlation Analysis Goals After this, you should be able to: • • • • • Calculate and interpret the simple correlation between two variables Determine whether the correlation is significant Calculate and interpret the simple linear regression equation for a set of data Understand the assumptions behind regression analysis Determine whether a regression model is significant Goals (continued) After this, you should be able to: • Calculate and...
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Nonlinear regression From Wikipedia, the free encyclopedia Regression analysis Linear regression.svg Models Linear regression Simple regression Ordinary least squares Polynomial regression General linear model Generalized linear model Discrete choice Logistic regression Multinomial logit Mixed logit Probit Multinomial probit Ordered logit Ordered probit Poisson Multilevel model Fixed effects Random effects Mixed model Nonlinear regression Nonparametric Semiparametric Robust Quantile Isotonic...
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