Location-scale family: Information from Answers.com

In probability theory, especially as that field is used in statistics, a location-scale family is a family of univariate probability distributions parametrized by a location parameter μ and a scale parameter σ ≥ 0; if X is any random variable whose probability distribution belongs to such a family, then Y = μ + σX is another, and every distribution in the family is of that form.

In other words, a class Ω of probability distributions is a location-scale family if whenever F is the cumulative distribution function of a member of Ω and μ is any real number and σ > 0, then G(x) = F(μ + σx) is also the cumulative distribution function of a member of Ω.

Examples

• normal distribution
• Cauchy distribution
• uniform distribution
• logistic distribution

References

http://www.ds.unifi.it/VL/VL_EN/special/special1.html