It is known that a process occurs with a frequency of 10 events per second and a second process with a frequency of 12 per second. Consider the two situations: 1. It is possible to repeat N times the experiment, that consists in counting the processes, over a period of 10 seconds. 2. It is possible to take a single measurement of the number of processes over a time T arbitrarily large. How should I choose N and T in order to claim, with a confidence level of 95%, that the two processes indeed occur at different rates?