# StatisticFormula Class

.NET Framework 4.6 and 4.5

Calculates statistical formulas.

## Inheritance Hierarchy

System.Object
System.Web.UI.DataVisualization.Charting.StatisticFormula

Namespace:  System.Web.UI.DataVisualization.Charting
Assembly:  System.Web.DataVisualization (in System.Web.DataVisualization.dll)

## Syntax

```public class StatisticFormula
```

The StatisticFormula type exposes the following members.

## Methods

NameDescription
AnovaThe Anova formula determines the existence or absence of a statistically significant difference between the mean values of two or more groups of data.
BetaFunctionThe beta function calculates the beta function value.
CorrelationThe correlation formula shows the strength of the relationship that exists between two random variables.
CovarianceThe covariance formula measures the degree of dependence that may exist between two random variables.
Equals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
FDistributionThe F distribution formula calculates the probability for the F-distribution.
FinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
FTestThe F-test formula performs a two-sample F-test using F distribution, and is used to see if the samples have different variances.
GammaFunctionThe gamma function calculates the gamma value.
GetHashCodeServes as the default hash function. (Inherited from Object.)
GetTypeGets the Type of the current instance. (Inherited from Object.)
InverseFDistributionThe inverse F distribution formula calculates the inverse of the F cumulative distribution.
InverseNormalDistributionThe inverse normal distribution formula calculates the inverse of the standard normal cumulative distribution. The distribution has a mean of 0 and a standard deviation of one.
InverseTDistributionThe inverse t-distribution formula calculates the t-value of the Student's t-distribution as a function of probability and degrees of freedom.
MeanThe mean formula calculates the average, or mean, of data stored in a data series.
MedianThe median formula calculates the median of the data stored in a data series.
MemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
NormalDistributionThe normal distribution formula calculates the value of the standard normal cumulative distribution. The distribution has a mean of 0 and a standard deviation of 1.
TDistributionThe t-distribution formula calculates the probability for the Student's t-distribution.
ToStringReturns a string that represents the current object. (Inherited from Object.)
TTestEqualVariancesThe t-test with equal variances formula performs a t-test using Student's t-distribution with equal variances.
TTestPairedThe t-test paired formula performs a t-test using Student's t-distribution with paired samples. This is useful when there is an observed natural pairing in samples (for example, when a sample group is tested twice).
TTestUnequalVariancesThe t-test with unequal variances formula performs a t-test using Student's t-distribution with unequal variances.
VarianceThe variance formula calculates the variance within a group of data.
ZTestThe Z-test formula performs a Z-test using normal distribution.
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## Remarks

Formulas can be loosely grouped into the following categories: distributions, including inverse distributions; tests; and basic statistical formulas. Each group has common characteristics with respect to their input and return values.

## Version Information

#### .NET Framework

Supported in: 4.6, 4.5, 4