class Rsquared::GrubbsTest
Tests for outliers on either side of the data grubbs = Rsquared::GrubbsTest.new(data)
grubbs.significant? => Boolean
Public Class Methods
new(data)
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Initializes the Test object with an array of numerical data
# File lib/Rsquared/GrubbsTest.rb, line 13 def initialize(data) @data = data.sort @gstat = [((@data.mean - @data.min)/@data.stddev).abs, ((@data.mean - @data.max)/@data.stddev).abs].max end
Public Instance Methods
inspect()
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# File lib/Rsquared/GrubbsTest.rb, line 30 def inspect significant? end
significant?(alpha=0.05)
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Returns a boolean indicating the significance of the test at the 5% level
# File lib/Rsquared/GrubbsTest.rb, line 22 def significant?(alpha=0.05) if @gstat > Helper::grubbscv(@data.length, alpha) then return true else return false end end
Also aliased as: outlier?
statistic()
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Returns the test statistic as a float
# File lib/Rsquared/GrubbsTest.rb, line 38 def statistic @gstat end