After measuring the duration of many telephone calls, thetelephone company found their
Chapter 8, Problem 21(choose chapter or problem)
After measuring the duration of many telephone calls, thetelephone company found their data was well approximatedby the density function p(x)=0.4e0.4x, wherex is the duration of a call, in minutes.(a) What percentage of calls last between 1 and 2 minutes?(b) What percentage of calls last 1 minute or less?(c) What percentage of calls last 3 minutes or more?(d) Find the cumulative distribution function.
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