## kurtosis

[kər tō**′**sis]

noun

the degree of peakedness of the graph of a statistical distribution, indicative of the concentration around the mean

Origin of kurtosis

; from Classical Greek*kyrtōsis,*a bulging, convexity ; from

*kyrtos,*curved: for Indo-European base see curve

## kurtosis

noun

*pl.*

**kur·to·ses**

A quantity indicating how sharply a probability distribution function increases and decreases around the distribution's mean.

Origin of kurtosis

Greek*kurtōsis*,

*bulging, curvature*, from

*kurtoun*,

*to make bulge*, from

*kurtos*,

*convex*; see

*sker-*

^{2}in Indo-European roots.

## kurtosis

Noun

(*plural* kurtoses)

- (statistics) A measure of "peakedness" of a probability distribution, defined as the fourth cumulant divided by the square of the variance of the probability distribution.

- leptokurtosis
- mesokurtosis
- platykurtosis
- excess kurtosis
- mesokurtic
- leptokurtic
- platykurtic

Origin

From Ancient Greek *κύρτωσις* (kurtōsis, “bulging, convexity”), from *κυρτός* (kurtos, “bulging”).