How open cdfs disc?

Open CDFs (Cumulative Distribution Functions) are typically represented as graphs that display the probability of a random variable being less than or equal to a certain value. They are "open" in the sense that they can extend infinitely in one direction (to the right) and may not have defined limits on the left. The curve is non-decreasing and approaches 0 as the variable approaches negative infinity and 1 as it approaches positive infinity. This provides a comprehensive view of the distribution of probabilities across the range of values.