IE 3301 Supplementary Problems for Continuous Probability Distributions [1]Thelengthoftime(inhours)thatMabelspendscontinuouslystudyingforherclassesfollowsalognormaldistributionwithµ=0.8andσ=0.3.Assumethelengthsofeachstudyperiodareindependent.(a)Givenln(3.5)=1.253,whatistheprobabilitythatMabelstudiescontinuouslyformorethan3.5hours?(b)WhatistheprobabilitythatMabelstudiescontinuouslyformorethan3.5hoursforthesecondtimeatherthirdstudyperiodofthesemester?[2]Ithasbeenobservedthat20%oftheexamineesonadrivingtestfail.50peopletaketheexam.UsingaNormalapproximation,whatistheprobabil
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