public static Nullable<decimal> StandardDeviationSample(
	this IEnumerable<Nullable<decimal>> source
)

<ExtensionAttribute>
Public Shared Function StandardDeviationSample ( 
	source As IEnumerable(Of Nullable(Of Decimal))
) As Nullable(Of Decimal)

[<ExtensionAttribute>]
static member StandardDeviationSample : 
        source : IEnumerable<Nullable<decimal>> -> Nullable<decimal>