Hi Everyone, How can we calculate the sample size for a 6*3 Williams model in non central t-distribution. The equation I have is below code. But I am stuck and is not able to go ahead. Any help would be of great use. Thanks in advance. 3. Algorithm for Sample Size Calculation Let σˆ2eσˆe2 denote the residual intrasubject MSE from a historical study; with Method 1, the sample size can be calculated with the following algorithm: Set values for α, φ, and µT/µR (default α = 0.05, φ = 0.80, and µT/µR = 1); Select a range of sample size (N1,N2), for each N ∊ [N1,N2], and do the following: V1=1.5σˆ2e/NV1=1.5σˆe2/N τ1 = [log(µT/µR) – log(▵L) ] / V1 τ2 = [log(µT/µR) – log(▵U) ] / V1 Calculate PRNT(–tν,α,ν6×3,τ2) – PRNT(–tν,α,ν6×3,τ1), where PRNT(·) is the probability from a noncentral t distribution, and ν6×3 = 2N – 4
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