Got a little problem with probability and exponential distribution. If something is said to happen twice a year on average, then I need to calculate the probability of it taking at least 9 months to happen, Is the equation 1-e^-2(9-12) or 1-e^-1/2(9-12). Also is it to correct to put it as X~EXP (2) or X~exp (1/2)
I do know exp is about time between the actions and poisson is action/time, but if lambda is given as 2 in the problem, shouldnt it be X~EXP (2) even though i'd use 1/2 in the actual equation?
I do know exp is about time between the actions and poisson is action/time, but if lambda is given as 2 in the problem, shouldnt it be X~EXP (2) even though i'd use 1/2 in the actual equation?