# kurtosis

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## kur·to·sis

(kər-tō′sĭs)
n. pl. kur·to·ses (-sēz′)
A quantity indicating how sharply a probability distribution function increases and decreases around the distribution's mean.

[Greek kurtōsis, bulging, curvature, from kurtoun, to make bulge, from kurtos, convex; see sker- in Indo-European roots.]

## kurtosis

(kəˈtəʊsɪs)
n
(Statistics) statistics a measure of the concentration of a distribution around its mean, esp the statistic B2 = m4/m22 where m2 and m4 are respectively the second and fourth moment of the distribution around the mean. In a normal distribution B2 = 3. See also platykurtic, mesokurtic, leptokurtic Compare skewness
[from Greek: curvature, from kurtos arched]

## kur•to•sis

(kɜrˈtoʊ sɪs)

n.
a measure of a curve describing the statistical frequency distribution in the region about its mode.
[1900–05; < Greek kýrtōsis convexity]
Translations
koeficient špičatostišpičatost
huipukkuus
kurtosiscoefficient d'aplatissement
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References in periodicals archive ?
mean, median, kurtosis, skewness and the dimensions of grains of sediments, play important role in understanding the environments of deposition of sediments.
It should be kept in mind that the true skewness and kurtosis values for a normal distribution are both equal to 0, and the normal q-q plot of a sample generated from a normal distribution should fall along the 45[degrees] line.
The first is based on scalar measurements such as root mean square (RMS), crest factor and the kurtosis [5] which gives a reasonably global defect indication without the possibility of its location in the bearing.
We also determined whether or not there was a change in the Data Generation Process (DGP) by analyzing the four moments of the distribution: the mean, variance, skewness, and kurtosis.
c) To analyze the basic descriptive statistics like mean, median, standard deviation, kurtosis and skewness for daily return.
The most important characteristics of financial time series are excess kurtosis (i.
mean, standard deviation, coefficient of variation, skew, kurtosis, median, quartile 1 and quartile 3 have been computed for each year.
Their proposed approach combines a heterodyne-based frequency reduction technique with time synchronous average (TSA) and spectral kurtosis (SK) to collect AE signals with a sampling rate that is comparable to that of vibration sensors, process AE sensor signals, and extract features as condition indictors for gearbox fault detection.
He slams the experimental design (or lack thereof), he criticizes how the analysis was done, he gripes about the lack of skewness and kurtosis measures, and he condemns the improper testing, the lack of statistical power, the improper use of significance measures, and the conclusions based on small regression coefficients.
The means and standard deviations of the variables were computed as well as statistics for kurtosis and skewness.
The skewness and kurtosis are usually considered as a normality test.
Los valores de asimetria y kurtosis (Cuadro 1) fueron cercanos a 0 para el caso de ICP, que indica una distribucion de los datos cercana a la normal.

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