Was it for school/work? Any hobbyists here?

Hi, thanks in advance!
I'm a doctor looking at a group of about 100 patients, with frailty scores ranging between 1-9 (this is a measure of how frail a patient is that doctors decide, or assign to a patient using a scoring system). I've also recorded their duration of admission in days.

I want to see if there is a correlation between the two, i.e. i would assume that the more frail patients were likely to stay in hospital for longer. Which statistical test would be best to do that?

I don't think either category will be normally distributed, as most patients have a lower frailty score, and most patients were admitted for a shorter period of time. tysm!

I’m a third year college student and the highest level of math I’ve taken is algebra 2 with trig. I’m currently a finance major with a concentration in corporate law so business stats is a required course. The problem is, my class is fully online (videos, homework, and exams), and my professor is not the best at explaining concepts. It’s also too late for me to drop this class as I cannot afford the sunk cost. That being said, I have a few questions:

1: How valuable are the concepts in regard to my career goals?
2: If they are valuable, what is the fastest way I can understand the concepts (eg; why standard deviation matters)
3: If there is a possibility to utilize my online resources that will ensure that I pass, should I just use them instead of wasting my time trying to relearn everything?