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A practical diagnostic guide for when SPSS includes placeholder codes like -999 or NA in descriptives and regression, with checks, fixes, and verification steps.
Use Minitab Session Commands to script repeatable regression and other engineering analyses instead of clicking through dialogs.
Compute age‑varying marginal effects after a logistic regression in Stata, verify with manual calculation or bootstrap, and watch for speed and SE limitations.
Learn how to route SPSS regression output directly into data files using the Output Management System (OMS). This article shows a step‑by‑step example, explains the underlying mechanism, and lists common pitfalls to avoid.
Quick answer: route SPSS output straight into a data file. If you need the numbers from a procedure (for example, the regression coefficients table) as a dataset you can merge, sort, or export, use the Output Management System (OMS).
Learn how Stata’s margins command computes adjusted predictions and marginal effects after regression, with a concrete example using the auto dataset and guidance on limitations and verification.
The task is to transform a right‑skewed response that contains zeros for regression analysis in Minitab, using a documented feature. Box‑Cox automatic lambda estimation requires strictly positive values, so the presence of zeros prevents the transformation from being applied, while the manual log‑plus‑constant method adds a chosen constant to zeros before lo
spss
minitab
stata