# Performing a Sobel test with huge discrepancies between unstandardized coefficients?

I have read pretty much everything I can find on performing a Sobel test on the internet however the huge discrepancy in my unstandardized coefficients makes me feel like I am doing something completely wrong (a = 0.000306, SEa = 0.000067, b = 430037.87. SEb = 258407.87). Did I miss a step somewhere? Thank you for any insights.

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What do you expect us to be able to say without seeing the data? – Michael Chernick Sep 8 '12 at 15:36
I was wondering if simply by looking at that huge discrepancy (a being practically zero and b being in the very high digits) someone could immediately identify that this was incorrect. By your response I sense that this is not the case? There seem to be very few examples of Sobel tests on the internet. Edit: Unfortunately I do not have the RAW data at this moment and this is all I have at the moment. I may be able to provide more data later. Thank you! – BillyHx Sep 8 '12 at 16:15

Instead use the bootstrap approach, either implemented for SPSS by Hayes, in R or SPSS by Kristopher Preacher (Preacher & Hayes have developed most together), or use the R mediation packahe by Kosuke Imai and colleagues.