VarianceIfc (JSLAll 1.0-SNAPSHOT API)

All Known Subinterfaces:

DistributionFunctionIfc, DistributionIfc, LossFunctionDistributionIfc

All Known Implementing Classes:

Bernoulli, Beta, Binomial, Constant, DEmpiricalCDF, Distribution, DUniform, Exponential, Gamma, Geometric, LogLogistic, Lognormal, MTP, NegativeBinomial, Normal, PearsonType5, PearsonType6, Poisson, ShiftedDistribution, ShiftedGeometric, ShiftedLossFunctionDistribution, StudentT, Triangular, TruncatedDistribution, Uniform, VConstant, Weibull
```
public interface VarianceIfc
```
Defines an interface for getting the variance of a distribution

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`double`	`getStandardDeviation()`	Returns the standard deviation for the probability distribution as the square root of the variance if it exists
`double`	`getVariance()`	Returns the variance of the distribution if defined

- Method Detail
  - getVariance
```
double getVariance()
```
    Returns the variance of the distribution if defined
    
    Returns:
    
    double the variance of the random variable
  - getStandardDeviation
```
double getStandardDeviation()
```
    Returns the standard deviation for the probability distribution as the square root of the variance if it exists
    
    Returns:
    
    sqrt(getVariance())