Odds
Odds
Odds (/ɒdz/) is a term used in statistics and probability theory to quantify the likelihood of a particular event. The term originates from the Old English word "odds", which means "chance" or "probability".
Definition
In the simplest terms, odds are a way of expressing the likelihood of an event occurring. They are calculated by dividing the number of favorable outcomes by the number of unfavorable outcomes. For example, if the odds of an event happening are 3 to 2, this means that for every 5 occurrences, the event is expected to happen 3 times and not happen 2 times.
Usage
Odds are commonly used in gambling and betting, where they are used to determine the payout for a winning bet. They are also used in medicine and epidemiology to express the risk of disease or the effectiveness of a treatment.
Related Terms
- Probability: The measure of the likelihood that an event will occur.
- Risk: The potential of losing something of value, weighed against the potential to gain something of value.
- Ratio: A relationship between two numbers indicating how many times the first number contains the second.
- Statistics: The discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.
Etymology
The term "odds" comes from the Old English "odds", which means "chance" or "probability". The use of the term in the context of gambling dates back to the 16th century.
External links
- Medical encyclopedia article on Odds
- Wikipedia's article - Odds
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