lib/distribution.rb in statsample-0.4.0 vs lib/distribution.rb in statsample-0.4.1

@@ -1,5 +1,13 @@
 require 'statistics2'
+# Several distributions modules to calculate cdf, inverse cdf and pdf
+# See Distribution::Pdf for interface.
+# 
+# Usage:
+#    Distribution::Normal.cdf(1.96)
+#    => 0.97500210485178
+#    Distribution::Normal.p_value(0.95)
+#    => 1.64485364660836
 module Distribution
     autoload(:ChiSquare, 'distribution/chisquare')
     autoload(:T, 'distribution/t')
     autoload(:F, 'distribution/f')
     autoload(:Normal, 'distribution/normal')