The density function of the time T in minutes between calls to an electrical supply store is given by: f(t) = 20 1 -t e 20 for the interval 0 < t < ∞. а. What is the mean time between calls? b. What is the variance in the time between calls?
The density function of the time T in minutes between calls to an electrical supply store is given by: f(t) = 20 1 -t e 20 for the interval 0 < t < ∞. а. What is the mean time between calls? b. What is the variance in the time between calls?
Chapter5: Exponential And Logarithmic Functions
Section5.5: Exponential And Logarithmic Models
Problem 4ECP
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