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
normal distribution in American English
Statistics
a symmetrical distribution, represented on a graph by a bell curve, in which the class with the highest frequency is at the center and the classes with the lowest frequency are at each end