ABSTRACT
Probability is about assigning numbers to the likelihood that certain events will occur, or, after the fact, assigning probabilities to the events that already did occur. A more specific way of conceptualizing probability is to consider how many different events are possible and how many meet certain criteria of interest. The additive law of probability states that the probability that either one of two events A and B will occur is equal to the sum of their individual probabilities minus the probability of them both occurring. The binomial probability distribution is known as a discrete probability distribution, because it is a distribution that can be used to describe the distribution of a discrete variable whose values are determined by a binomial process. Of all discrete probability distributions, the binomial distribution is probably one of the most important. Another important probability distribution is the normal probability distribution, or its standardized equivalent, the standard normal probability distribution.
