When calculating the probability of a single event, what value range is the probability constrained to?

The range of probability for a single event is always between 0 and 1. This means that the lowest possible probability is 0, indicating that the event cannot happen at all, and the highest possible probability is 1, signifying that the event is certain to occur.

When considering probabilities, any value outside of this range does not make sense within the context of probability theory. Thus, a probability of something happening cannot be negative (which would be depicted in the -1 to 1 range) and it cannot exceed 1.

While probabilities can also be expressed as percentages ranging from 0% to 100%, this is simply a different way of presenting the same numerical probability values; for instance, a probability of 0.5 corresponds to 50%. However, in its basic numeric form, the most accurate and conventional representation is between 0 and 1.

Ensuring understanding of this crucial range helps in evaluating and calculating probabilities effectively in various contexts, including events, trials, and experiments.