Jumat, 11 April 2008

REGRESSION ANALYSIS

Regression analysis is one of the most popular statistical tools that’s used to investigate the relationship among numerical variable. To do regression analysis using SPSS, you can follow these steps :

  1. On the main menu, click ‘analyze’ -> ‘regression’ -> ‘linear’.
  2. Enter dependent variable into ‘dependent box’ and enter independent variable into ‘independent box’.
  3. click ‘statistics’ and choose the output that you need :

- ‘estimate’ : will give you estimation of regression coefficient.

- ‘confidence interval’ : will give you confidence interval of regression coefficient.

- ‘model fit’ : to see coefficient of determination.

- ‘descriptive’ : will give you mean, standard deviation and count of observation that you use.

- ‘durbin watson’ : will give you durbin watson statistic to examine autocorrelation in the model.

- ‘casewise diagnostics’ : to examine outlier in the model.

- click ‘continue’

- to check assumption of normality of residual, click ‘plots’, you can use standardized residual plot and then choose normality probability plot.

- click ‘continue’ -> ‘OK’.

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