Motivation On average, lightning kills three people each year in the UK. so the rate is . What is the probability that the time until the next death is less than one year? Assume strikes occur randomly at any time during the year.• ExponentialExamplesApplicatio n

Exponential Distribution The Poisson distribution defines a random variable as the number of flaws along a length of wire (flaws per mm). The exponential distribution defines a random variable as the interval between flaws (mm's between flaws - the inverse). Poisson distribution = # of events that occur in an interval of time Exponential distribution = the time between two successive eventsExponentialExamplesApplicatio n