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29 lines
721 B
Markdown
29 lines
721 B
Markdown
---
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slug: /en/sql-reference/aggregate-functions/reference/kurtsamp
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sidebar_position: 154
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---
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# kurtSamp
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Computes the [sample kurtosis](https://en.wikipedia.org/wiki/Kurtosis) of a sequence.
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It represents an unbiased estimate of the kurtosis of a random variable if passed values form its sample.
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``` sql
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kurtSamp(expr)
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```
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**Arguments**
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`expr` — [Expression](../../../sql-reference/syntax.md#syntax-expressions) returning a number.
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**Returned value**
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The kurtosis of the given distribution. Type — [Float64](../../../sql-reference/data-types/float.md). If `n <= 1` (`n` is a size of the sample), then the function returns `nan`.
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**Example**
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``` sql
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SELECT kurtSamp(value) FROM series_with_value_column;
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```
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