a theoretical frequency distribution represented by a normal curve.
(statistics) a continuous distribution of a random variable with its mean, median, and mode equal, the probability density function of which is given by (exp-[(x–μ)²/2σ²]/σ√(2π)) where μ is the mean and σ² the variance Also called Gaussian distribution
A theoretical frequency distribution for a set of variable data, usually represented by a bell-shaped curve symmetrical about the mean.
- Normal distribution curve
In statistics, the theoretical curve that shows how often an experiment will produce a particular result. The curve is symmetrical and bell shaped, showing that trials will usually give a result near the average, but will occasionally deviate by large amounts. The width of the “bell” indicates how much confidence one can have in the […]
noun, Mathematics. 1. a normal subgroup.
noun, Statistics. 1. a value x such that the integral of a normal curve over all those values of the independent variable less than x is equal to the given probability.
noun, Geology. 1. . normal fault A geologic fault in which the hanging wall has moved downward relative to the footwall. Normal faults occur where two blocks of rock are pulled apart, as by tension. Compare reverse fault. See Note and illustration at fault.