Probability is a measure of how likely an event is to occur. PRESUMPTION is an assumption made without proof or evidence, while OUTLOOK is a person's attitude or point of view. PROSPECT is the POSSIBILITY of something happening in the future, and PLAUSIBILITY is the quality of being believable. FEASIBILITY is the ability to be done or achieved, and OPPORTUNITY is a favorable set of circumstances. POSSIBILITY is the potential for something to happen, EXPECTATION is a strong belief that something will happen, and CONTINGENCY is a possible event or circumstance that may or may not occur. CHANCE is an unpredictable outcome, LIKELIHOOD is the probability of something happening, ODDS are the probability of something happening compared to something else, and STATISTICS is the study of numerical data.