Hi all,
I am having problems with analysis. I want to perform a multiple linear regression.
1). The dependent variable and all but one of the independent variables is normally distributed. I was made aware that the independent variables don't have to be normally distributed to use it for a regression but the residuals need to be normally distributed.
2). Second problem the fact that SPSS calculates pearsons r for the non normal variable instead of spearmans rho. Does this invalidate the analysis? Admittedly if spearmans correlation (onetail.....I am told that is more accurate) is done between my dependent variable and my nonnormal variable, the correlation is barely insignificant (p=0.056) but with peason (also one tail) it is very significant).
3). Any recommendation on the best way of checking for heteroscedasticity? I have looked at the scatter plot and it seems to have homoscedasticity and I have tried to test statistically by performing a linear regression using the square of the unstandardized residuals and checking that the ANOVA is not significant (not sure how that works). Is there any other means of checking?
See attached file for my output. Any help or suggestion would be highly appreciated
I am having problems with analysis. I want to perform a multiple linear regression.
1). The dependent variable and all but one of the independent variables is normally distributed. I was made aware that the independent variables don't have to be normally distributed to use it for a regression but the residuals need to be normally distributed.
2). Second problem the fact that SPSS calculates pearsons r for the non normal variable instead of spearmans rho. Does this invalidate the analysis? Admittedly if spearmans correlation (onetail.....I am told that is more accurate) is done between my dependent variable and my nonnormal variable, the correlation is barely insignificant (p=0.056) but with peason (also one tail) it is very significant).
3). Any recommendation on the best way of checking for heteroscedasticity? I have looked at the scatter plot and it seems to have homoscedasticity and I have tried to test statistically by performing a linear regression using the square of the unstandardized residuals and checking that the ANOVA is not significant (not sure how that works). Is there any other means of checking?
See attached file for my output. Any help or suggestion would be highly appreciated
Attachments

475.4 KB Views: 5