class Statistics::Distribution::Bernoulli
Public Class Methods
cumulative_function(n, p)
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# File lib/statistics/distribution/bernoulli.rb, line 13 def self.cumulative_function(n, p) return if n != 0 && n != 1 # The support of the distribution is n = {0, 1}. case n when 0 then 1.0 - p when 1 then 1.0 end end
density_function(n, p)
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# File lib/statistics/distribution/bernoulli.rb, line 4 def self.density_function(n, p) return if n != 0 && n != 1 # The support of the distribution is n = {0, 1}. case n when 0 then 1.0 - p when 1 then p end end
kurtosis(p)
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# File lib/statistics/distribution/bernoulli.rb, line 30 def self.kurtosis(p) (6.0 * (p ** 2) - (6 * p) + 1) / (p * (1.0 - p)) end
skewness(p)
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# File lib/statistics/distribution/bernoulli.rb, line 26 def self.skewness(p) (1.0 - 2.0*p).to_r / Math.sqrt(p * (1.0 - p)) end
variance(p)
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# File lib/statistics/distribution/bernoulli.rb, line 22 def self.variance(p) p * (1.0 - p) end