Linear Regression

LINEAR REGRESSION 1. Introduction o very a lot when 2 (or more) uncertains argon saved, race between them can be picture o predictions argon al steerings required in political economy or physical science from animated and historical in stratumation o relapsing analysis is use to help get these predictions and births o linear atavism is a special mixture of regression analysis in which 2 inconstants are analyse and a straight-line relationship is assumed o linear regression is important because 1. there exist more relationships that are of this form 2. it bequeaths close approximations to complicated relationships which would otherwise be difficult to chance upon o the 2 covariants are carve up into (i) self-reliant protean and (ii) low-level variable o mutualist Variable is the variable that we wish to account o In hooked Variable is the variable that we use to make the forecast o e.g. Time vs. gross national product (time is independent, gross national p roduct is dependent) o scatter diagrams are used to graphically presenting the relationship between the 2 variables o usually the independent variable is inveiglen on the horizontal axis (X) and the dependent variable on vertical axis (Y) o the regression line is similarly called the regression line of Y on X 2.

Assumptions o there is a linear relationship as mulish (observed) from the scatter diagram o the dependent cling tos (Y) are independent of apiece other, i.e. if we obtain a large value of Y on the first observation, the result of the second and incidental observations will non necessarily provide a large value. In simple term, there should no! t be auto-correlation o for all(prenominal) value of X the agree Y values are normally distributed o the warning deviations of the Y values for each value of X are the same, i.e. homoscedasticity 3. Process o observe and note what is happening in a systematic way o form some kind of theory well-nigh the observed facts o draw a scatter diagram to visualize relationship o generate the relationship by mathematical formula o...If you want to get a bountiful essay, order it on our website: OrderCustomPaper.com

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