Cumulative Distribution Function

A cumulative distribution function (CDF) is a mathematical tool used in statistics to describe the probability of a random variable being less than or equal to a certain value. Essentially, it shows how probabilities accumulate across different outcomes. For example, if you have a range of possible test scores, the CDF helps you understand the likelihood of scoring below a specific point. It's a useful way to visualize and analyze data, as it reveals the overall distribution of values and helps in understanding trends and probabilities in various contexts.