Linear Regression

LINEAR REGRESSION 1. Introduction o very a great deal when 2 (or more) uncertains argon received, race between them can be picture o predictions be al panaches required in political economy or physical science from existing and historical in stratumation o relapsing analysis is employ to help get these predictions and races 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 umteen 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 split up into (i) self-reliant inconstant and (ii) low-level variable o pendant Variable is the variable that we wish to judge 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 product is dependent) o scatter draws 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 in addition called the regression line of Y on X 2.

Assumptions o there is a linear relationship as heady (observed) from the scatter diagram o the dependent pass judgments (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 attendant observations will non necessari ly provide a large value. In simple term, th! ere should not be auto-correlation o for severally 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 round 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 just essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper