My on-line statistics course through Coursera

In the statistics course I'm taking (online) I'm definitely way beyond the normal distribution and beyond the 3rd standard deviation in age.  The instructor kept assuring us we didn't need math, but since he talks about percentages and decimals and uses funny little Greek symbols, and my last math class was 1955, I sort of smile when he says that. There's some very, very basic math that I probably learned in 4th grade that I no longer remember.  When I don't understand I look it up on Google and add the word Khan (online academy for children). But I did get 100% on the Week 3 quiz--after the 2nd try. 

Now I'm in week 4, and not even sure what to Google!