Modulestatistics-0.16.5.0Haskell2010

Statistics.Test.Levene

Levene's test used to check whether samples have equal variance. Null hypothesis is all samples are from distributions with same variance (homoscedacity). Test is robust to non-normality, and versatile with mean or median centering.

Example3 expressions

>>> import qualified Data.Vector.Unboxed as VU>>> import Statistics.Test.Levene>>> :{let a = VU.fromList [8.88, 9.12, 9.04, 8.98, 9.00, 9.08, 9.01, 8.85, 9.06, 8.99]    b = VU.fromList [8.88, 8.95, 9.29, 9.44, 9.15, 9.58, 8.36, 9.18, 8.67, 9.05]    c = VU.fromList [8.95, 9.12, 8.95, 8.85, 9.03, 8.84, 9.07, 8.98, 8.86, 8.98]in levenesTest Median [a, b, c]:}Right (Test {testSignificance = mkPValue 2.4315059672496814e-3, testStatistics = 7.584952754501659, testDistribution = fDistributionReal 2.0 27.0})

1 type
1 value

Packagestatistics-0.16.5.0
Exports2
LanguageHaskell2010
LicenceBSD-2-Clause
SourceLevene.hs

datadata Center

Center calculation method

Constructors

Mean
Use arithmetic mean
Median
Use median
Trimmed !Double
Trimmed mean with given proportion to cut from each end

Instances2Eq, Show

Eq CenterDefined in statistics-0.16.5.0 · Statistics.Test.Levene
Show CenterDefined in statistics-0.16.5.0 · Statistics.Test.Levene

valuelevenesTest

:: Vector v Double
=> Center
Centering method
-> [v Double]
Input samples
-> Either String (Test FDistribution)

Main Levene's test function with full error handling