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In SPSS, how do I use the log of the dependent variable in a regression analysis?

To use the log of a dependent variable in a regression analysis, first create the log transformation using the COMPUTE command and the LN() function. Then specify the new variable in the regression model.

Suppose y is the original dependent variable and X is your independent variable. In the following example, ln_y is the name given to the new variable:

COMPUTE ln_y=LN(y). REGRESSION /DEPENDENT=ln_y /ENTER=x.

If you wish to compute the base 10 logarithm of a variable, use the function LG10() instead of LN() .

For more about statistical and mathematical software, email the UITS Stat/Math Center, visit the center's web page, or phone 812-855-4724 (IUB) or 317-278-4740 (IUPUI). The center is located in Bloomington at 410 N. Park Avenue, and is open for consultation by appointment Monday-Friday 9am-5pm.

This is document afic in domain all.
Last modified on January 24, 2011.

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