This paper gives analytic expressions for the moments and recurrence relations for the first four raw moments of a doubly noncentralt-distribution withvdegrees of freedom and noncentrality parameters δ and λ. Table I provides numerical values of these moments forv= 2 (1) 20, λ = 2 (2) 8 (4) 20 and any suitable δ. Two approximations to thet″-distribution, involving the moments, are considered.