LC3 Random variables and discrete probability distributions

Formal definition of a random variable：A function mapping the sample space to the real line

X : Function that maps outcomes to real numbers

• X(s) : The numerical value of X for outcome s

• C0uld be many-to-one

• Deterministic (non-random)

• Typically denoted with capital letters

• Function (A.2 in book): in: domain, out: target