Probability
Noun
US
/prɑbəˈbɪləti/
UK
/prɒbəˈbɪləti/
Key difference: US /ɑ/ "ah" as in father · UK /ɒ/ "o" as in hot
US
/prɑbəˈbɪləti/
UK
/prɒbəˈbɪləti/
The measure of how likely an event is to occur, ranging from 0 to 1.
Flipping a fair coin has a probability of 0.5 for getting heads.
Insurance companies use probability calculations to set premiums based on risk.
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Probability theory emerged from analyzing games of chance and is now foundational to statistics, quantum mechanics, and risk assessment. The law of large numbers shows that experimental probabilities converge to theoretical probabilities with repeated trials.
Essential in statistics, finance, medicine, engineering, and scientific research.
Medical researchers use probability to calculate if a drug trial shows statistically significant results.