Suppose again that \(N\) is the trial number of the first success in a sequence of Bernoulli trials, so that \(N\) has the geometric distribution on \(\N_+\) with parameter \(p \in (0, 1]\). The mean and variance of \(N\) can be computed in several different ways.uppose again that \(N\) is the trial number of the first success in a sequence of Bernoulli trials, so that \(N\) has the geometric distribution on \(\N_+\) with parameter \(p \in (0, 1]\). The mean and variance of \(N\) can be computed in several different ways.
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An alternator or synchronous generator is a machine where the frequency of voltages induced, currents produced maintains the constant relation ship with the synchronous speed.â¦. 5 people found this useful. Baldfatguy.lternator use ac voltage to recharge battery and will charge battery at vehicle idle. Much faster and more efficient than the generator. It is not unusual for an alternator to last the life of a vehicle where a generator would require a rebuild or replacement during the life of vehicle.