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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.
Decision guide for pandas 2.x: nullable Int64 vs float64-with-NaN for integer columns with missing values. Compare memory, performance, correctness, and interoperability trade-offs, with concrete validation steps.
Symptom When running a script that calculates a mean with MEAN , the result differs between a local SPSS installation and the production server, even though the same data files and MISSING VALUES declarations are used. Goal Confirm that the MEAN function treats user‑missing values identically across environments and determine whether any configuration or ver
pandas
spss