What is Regression Analysis

In statistics AU111: The URL http://en.wikipedia.org/wiki/Statistics has been redirected to https://en.wikipedia.org/wiki/Statistics. Please verify the URL. , regression analysis is a statistical process for estimating the relationships among variables. It includes many techniques for modeling and analyzing several variables, when the focus is on the relationship between a dependent variable AU112: The URL http://en.wikipedia.org/wiki/Dependent_variable has been redirected to https://en.wikipedia.org/wiki/Dependent_variable. Please verify the URL. and one or more independent variables AU113: The URL http://en.wikipedia.org/wiki/Independent_variable has been redirected to https://en.wikipedia.org/wiki/Independent_variable. Please verify the URL. . More specifically, regression analysis helps one understand how the typical value of the dependent variable (or 'criterion variable') changes when any one of the independent variables is varied, while the other independent variables are held fixed. Most commonly, regression analysis estimates the conditional expectation AU114: The URL http://en.wikipedia.org/wiki/Conditional_expectation has been redirected to https://en.wikipedia.org/wiki/Conditional_expectation. Please verify the URL. of the dependent variable given the independent variables – that is, the average value AU115: The URL http://en.wikipedia.org/wiki/Average_value has been redirected to https://en.wikipedia.org/wiki/Average_value. Please verify the URL. of the dependent variable when the independent variables are fixed. Less commonly, the focus is on a quantile AU116: The URL http://en.wikipedia.org/wiki/Quantile has been redirected to https://en.wikipedia.org/wiki/Quantile. Please verify the URL. , or other location parameter AU117: The URL http://en.wikipedia.org/wiki/Location_parameter has been redirected to https://en.wikipedia.org/wiki/Location_parameter. Please verify the URL. of the conditional distribution of the dependent variable given the independent variables. In all cases, the estimation target is a function AU118: The URL http://en.wikipedia.org/wiki/Function_(mathematics) has been redirected to https://en.wikipedia.org/wiki/Function_(mathematics). Please verify the URL. of the independent variables called the regression function. In regression analysis, it is also of interest to characterize the variation of the dependent variable around the regression function which can be described by a probability distribution AU119: The URL http://en.wikipedia.org/wiki/Probability_distribution has been redirected to https://en.wikipedia.org/wiki/Probability_distribution. Please verify the URL. . Regression analysis is widely used for prediction AU120: The URL http://en.wikipedia.org/wiki/Prediction has been redirected to https://en.wikipedia.org/wiki/Prediction. Please verify the URL. and forecasting AU121: The URL http://en.wikipedia.org/wiki/Forecasting has been redirected to https://en.wikipedia.org/wiki/Forecasting. Please verify the URL. , where its use has substantial overlap with the field of machine learning AU122: The URL http://en.wikipedia.org/wiki/Machine_learning has been redirected to https://en.wikipedia.org/wiki/Machine_learning. Please verify the URL. . Regression analysis is also used to understand which among the independent variables are related to the dependent variable, and to explore the forms of these relationships. In restricted circumstances, regression analysis can be used to infer causal relationships AU123: The URL http://en.wikipedia.org/wiki/Causality has been redirected to https://en.wikipedia.org/wiki/Causality. Please verify the URL. between the independent and dependent variables. However this can lead to illusions or false relationships, so caution is advisable; for example, correlation does not imply causation AU124: The URL http://en.wikipedia.org/wiki/Correlation_does_not_imply_causation has been redirected to https://en.wikipedia.org/wiki/Correlation_does_not_imply_causation. Please verify the URL. . Many techniques for carrying out regression analysis have been developed. Familiar methods such as linear regression AU125: The URL http://en.wikipedia.org/wiki/Linear_regression has been redirected to https://en.wikipedia.org/wiki/Linear_regression. Please verify the URL. and ordinary least squares AU126: The URL http://en.wikipedia.org/wiki/Ordinary_least_squares has been redirected to https://en.wikipedia.org/wiki/Ordinary_least_squares. Please verify the URL. regression are parametric AU127: The URL http://en.wikipedia.org/wiki/Parametric_statistics has been redirected to https://en.wikipedia.org/wiki/Parametric_statistics. Please verify the URL. , in that the regression function is defined in terms of a finite number of unknown parameters AU128: The URL http://en.wikipedia.org/wiki/Parameter has been redirected to https://en.wikipedia.org/wiki/Parameter. Please verify the URL. that are estimated from the data AU129: The URL http://en.wikipedia.org/wiki/Data has been redirected to https://en.wikipedia.org/wiki/Data. Please verify the URL. . Nonparametric regression AU130: The URL http://en.wikipedia.org/wiki/Nonparametric_regression has been redirected to https://en.wikipedia.org/wiki/Nonparametric_regression. Please verify the URL. refers to techniques that allow the regression function to lie in a specified set of functions AU131: The URL http://en.wikipedia.org/wiki/Function_(mathematics) has been redirected to https://en.wikipedia.org/wiki/Function_(mathematics). Please verify the URL. , which may be infinite-dimensional AU132: The URL http://en.wikipedia.org/wiki/Dimension has been redirected to https://en.wikipedia.org/wiki/Dimension. Please verify the URL. . The performance of regression analysis methods in practice depends on the form of the data generating process AU133: The URL http://en.wikipedia.org/wiki/Data_generating_process has been redirected to https://en.wikipedia.org/wiki/Data_generating_process. Please verify the URL. , and how it relates to the regression approach being used. Since the true form of the data-generating process is generally not known, regression analysis often depends to some extent on making assumptions about this process. These assumptions are sometimes testable if a sufficient quantity of data is available. Regression models for prediction are often useful even when the assumptions are moderately violated, although they may not perform optimally. However, in many applications, especially with small effects AU134: The URL http://en.wikipedia.org/wiki/Effect_size has been redirected to https://en.wikipedia.org/wiki/Effect_size. Please verify the URL. or questions of causality based on observational data AU135: The URL http://en.wikipedia.org/wiki/Observational_study has been redirected to https://en.wikipedia.org/wiki/Observational_study. Please verify the URL. , regression methods can give misleading results.

As a term is related to determining the mutual relations between two or more phenomena. For example, we may be interested in the relationship between the time spent preparing for the exam and the grade obtained on the exam, employees' salaries and their education, interest rates and money supply. In order to determine whether and to what extent these phenomena are dependent, we make regressions model. Regression analysis has a wide application in predicting and forecasting phenomena in various fields, such as economics, medicine, psychology, history.

Helps us to understand how the dependent variable evolves when one of the independent variables varies, as a result allowing the mathematical determination of the variables that have a greater impact on the dependent variable.

Is a statistical study of the effect of one or several independent variables on a dependent variable.

It is a statistical process for denoting the average relationship between two or more factors with the involvement of dependent and independent variables.

A technique where, using a dataset containing data on past finished projects, an Equation is generated, representing the relationship between size, cost drivers, and effort. Such Equation is generated using a procedure that determines the “best” straight-line fit to a set of project data that represents the relationship between effort and size & cost drivers

It is a statistical tool for estimating the relationships between variables.

A statistical technique used to explore relationship among two or more variables. In data mining, regression analysis is used for predicting numeric values.

A regression analysis is a statistical process for estimating the relationships among variables.

Is a set of statistical processes for estimating the relationships among variables. It includes many techniques for modeling and analyzing several variables when the focus is on the relationship between a dependent variable and one or more independent variables (predictors).

A statistical technique used to find relationships between variables for the purpose of predicting future variables.

A statistical technique for estimating relationships among variables. The technique is used to understand which among the independent variables are related to the dependent variable. The technique is effective in developing a framework.

Is a statistical technique that helps in determining the relationship between a single dependent variable (response) and one or more independent variables (influencing factors).

the statistical tecniques used to investigate the relationships among a group of variables and to create models able to describe them.

It is a technique that examines the relation of a dependent variable to specified independent variables.

Regression Analysis is a set of statistical methods used in the estimation of relationship between a dependent variable and one or more independent variables of a research/analysis.

It is a statistical tool for estimating the relationships between variables.

A mathematical process of building a model based upon a set of data and identification of the variables.

A statistical technique used to model the relationship between a dependent variable and one or more independent variables.

Is a statistical study of the effect of one or several independent variables on a dependent variable.