Statistics, Machine Learning, Data Science, Central Limit Theorem, Sample.
of that r.v. taking a particular value, or values in a particular range (e.g. p(13 <= A_i < 20) tells us the probability that a randomly-selected US citizen is a teenager). If we cared about marital status instead of age, we might have gotten r.v.s M_1, M_2, …, M_N. Here, each M_i takes only two