normal distribution (redirected from Normal distributions)

normal distribution,

n a curve representing the frequency with which the values of a variable are obtained or observed when the number is infinite and variation is subject only to chance factors. The curve is a symmetrical, bell-shaped curve with the highest frequency occurring in the middle and gradually tapering toward the extremes. In a normal distribution, 68.2% of all scores cluster around the mean within approximately 1 standard deviation, 95.4% within approximately 2 standard deviations, and 99.7% within approximately 3 standard deviations. Also called
normal curve, Gauss' curve.