﻿ Percentile25(Series) Method
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 dotnetCHARTING Namespace > StatisticalEngine Class > Percentile25 Method : Percentile25(Series) Method

s
A statistical series.
Calculates the first percentile of the series's elements YValues.

# Syntax

Visual Basic (Declaration)
```Public Overloads Shared Function Percentile25( _
ByVal s As Series _
) As Element```
Visual Basic (Usage)Copy Code
``````Dim s As Series
Dim value As Element

value = StatisticalEngine.Percentile25(s)``````
C#
```public static Element Percentile25(
Series s
)```

#### Parameters

s
A statistical series.

# Remarks

Recall that the percentile is the value such that at least `interest`-percent of the data set items are less than or equal to this value, or equivalently if at least `(100-interest)` percent of the items are greater than or equal to this value.

Remarks:

1. The `50`-th percentile is the measure of centrality of a data set known as the median. The median can also be evaluated using FinancialMedian.
2. The `25`-th, `50`-th, `75`-th percentiles are often referred to as the `1`-st, `2`-nd (median) and `3`-rd quartile respectively. The term quartile refers to the fact that these three values will roughly divide the data set considered into four equal parts.