I do not have a background in mathematics. However, I do empirical research and I oftentimes have difficulties finding the correct mathematical notations for certain things I want to express:
I am comparing two sets of values. Each value in one set relates to a certain value in the other set, i.e. the two sets represent a set of "pairs". How do I express that, e.g. more than half of the values in one set are larger than their respective counterpart in the other set?