| http://www.w3.org/ns/prov#value | - Vol. 42, No. 1, Winter 2008 37 Among these higher moments, the second moment about the mean, i.e. the variance, is about its mean. [29] Eq. (6) in conjunction with Eqs. (7) and (8) yields the expression for the mean of N A (t), E[N A (t)] or N A (t) as Nt n kk n n kk k A T A T 0 12 0 0 12 2 2 1 22 ex pk kt k 9 Note that in the particular case where n A0 = n T0 i.e. where n B0 = 0, the above expres
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