Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsProbabilistic Model Showing Sigmoid Semilogarithmic Survivalhttp://demonstrations.wolfram.com/ProbabilisticModelShowingSigmoidSemilogarithmicSurvival/]]>http://demonstrations.wolfram.com/ProbabilisticModelShowingSigmoidSemilogarithmicSurvival/