leptokurtic
- adjective
- /ˌlɛptoʊˈkɜrtɪk/
- Specialized
:
leptocúrtica
- In statistics, a leptokurtic distribution indicates that data points cluster around the mean, resulting in a sharp peak and longer tails.
Examples
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Examining the frequency distribution for experience sampling moments by time of day demonstrated a somewhat leptokurtic distribution with a clustering of experience sampling reports between 10 AM and noon (see Figure 1).
Academic text (2008) -
The distribution of FCAT scores for 2007 and 2008 more closely approximated a normal distribution for the RSSP group compared to the control group, where the scores were negatively skewed and leptokurtic.
Academic text (2015) -
As with the full sample, all variables were normally distributed with the exception of SES, which was again positively skewed and leptokurtic.
Academic text (2002) -
Finally, Macdonald refers to a central tendency error in which the observer distorts the true distribution of abilities towards a leptokurtic distribution; that is, the performance is judged as neither good nor bad.
Academic text (1993) -
Data analysts often look for leptokurtic distributions when assessing the risk of extreme values in financial datasets.
-
The research revealed that the test scores followed a leptokurtic distribution, suggesting a higher likelihood of outliers in both high and low performances.
Synonyms
A sound or picture with sharp peaks at high tones
How Peaked
- Specialized
- Specialized
1
4.2
40
5.5
- Specialized
Surface Forms
Morphology
Etymology
Leptokurtic comes from Greek parts lepto- meaning 'thin' and -kurtic from a Greek word for 'curve' or 'hump', like the English word 'curve'. So a leptokurtic distribution has a 'thin', very sharp peak in the middle and heavier ends, which is why it shows more extreme values than a normal distribution.