Today we reviewed the terminology and some initial steps required to start investigating Probability Distributions. One of the first things one can do when arranging data is to draw up a 'frequency table' that lists the number of times outcomes occur in a sample space. From this information, one can easily calculate probabilities of the different outcomes, and arrange the data as a bar graph, for example. A 'cumulative probability' describes a probability over a continuous range of events, such as the number of times something occurs over a week.