Tut tut tut! Instead of just multiplying together those factors, you need to consider the probability distribution on each one and estimate the resulting probability distribution of N. Most of the distribution will probably have smaller N than your point estimate.
Tut tut tut! Instead of just multiplying together those factors, you need to consider the probability distribution on each one and estimate the resulting probability distribution of N. Most of the distribution will probably have smaller N than your point estimate.
[:-)]