In this lecture, we will discuss probability distributions. Also, we will introduce another modeling technique- lattices. Random Variable, x Consider an experiment where a coin is flipped twice. We let random variable, x, take on the number of heads obtained.
Random variable x is a variable just like in algebra.
Thus, the probability of flipping a coin twice and obtaining zero heads is 0.25. That is, the probability of flipping a coin twice and getting 1 head is 0.5.