Method: Statsample::Test#z_critical

Defined in:
lib/statsample/test.rb

#z_critical(confidence_level) ⇒ Object

Get critical z to create confidence interval



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# File 'lib/statsample/test.rb', line 40

def z_critical(confidence_level)
  -Distribution::Z.p_value((1-confidence_level) / 2.0)
end