Neuropsychological testing

I'm being scheduled for neuropsychological assessment due to loss of my intellect.  I'm a 43 year old electrical and software engineer who owns her own consulting firm.  Prior to the loss, my math, science, assessment, diagnostic, and analytical skills were advanced.  My clients look to me to help them solve their problems.  Now I don't understand numbers, electricity, computers, etc.

Question:
When the data is compared, how is to matched to a specific poll? I'm concerned that my results will be skewed as I once possessed advanced knowledge and skills. Or are the battery of tests broad enough to encompass a range of individuals?

Thank you, Tonya