Box-Cox I-MR chart: lognormal lifetimes
50 lognormally distributed lifetimes. A plain I-MR chart raises false alarms because of the right skew. After Box-Cox transformation (λ ≈ 0) the residuals become approximately normal.
50 lognormally distributed lifetimes. A plain I-MR chart raises false alarms because of the right skew. After Box-Cox transformation (λ ≈ 0) the residuals become approximately normal.