As suggested, at least algebra to be able to comprehend statistics...then, always remember my fave stats textbook "How to Lie with Statistics" !!! LOL
Then, how about a PsyD track vs. a PhD one? The PhD track is the one that purports to be 'scientific'. It's not really, just mathematical mumbo - jumbo and supposedly you then qualify to interpret the psych test....which always were and always will be, mere tools. That any competent 'artistic' clinician can trump - for evaluation, assessment and treatment planning.
I have grieved that my beloved "art" was stillborn !! Psychology. And it does my heart good that some can see that is is sorely needed and absolutely fascinating, stimulating and creative. But, not via the PhD process. That process is for the purpose of indoctrinating the candidate in a 'scientific' mindset in a domain that should have remained - artistic.
Best Wishes in 08.