probability density function
nounA math tool that shows how likely different values are for something that can take many possible amounts.
The probability density function showed that most students scored near 75 on the test.
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OTHER MEANINGS
2. A function whose area under its curve over an interval gives the probability that a continuous random variable falls in that interval.
To find the chance of a value between 2 and 4, we integrate the probability density function over that range.
3. A non-negative function that integrates to one over the whole real line, used to describe continuous data.
The normal curve is a well-known probability density function with a bell shape.
4. In physics, a function describing how a quantity such as mass or charge is spread through space.
The electron probability density function tells where an electron is most likely to be found around the nucleus.