MS Statistics Math Prerequisites Question

[croyfish]

I'm thinking about returning to grad school after an 11 year absence from studying and advanced mathematics. Statistics is the field I am most interested in, and I have the right undergraduate prerequisites (Calc I-III, Linear Algebra, Prob & Stat). However, I'm worried about being rejected because of how long ago my coursework was. I've been in education since that time and haven't really used or reviewed any upper-level mathematics. Ideally, I'd like to get into a mid-tier program.

Application deadlines for Fall 2017 are coming up and I'm trying to decide whether or not it makes sense to apply this year and how programs would view a mid-life career-change candidate with my background. My undergrad GPA (in EE) was 3.7 and my GRE scores are good (top 5% verbal and math), but I didn't take the GRE mathematics subject test this year. The programs I'm looking at do not require the subject test.

Would I have any chance of being accepted if I applied this year, or should I spend a year reviewing math, take the GRE math test (to demonstrate to programs that I still can remember how to do the upper level stuff) and wait to apply until next year? If I were accepted for 2017, I'd spend the summer reviewing mathematics anyway. Are first year courses in MS stat heavily reliant on advanced calculus, or do programs just want to see that you have ability in math? It seems like some people have gone on to study statistics even after doing some undergraduate degrees in completely unrelated areas. Any and all advice will be greatly appreciated.