Spss 26 Code

ONEWAY test_score BY age_group
  /STATISTICS DESCRIPTIVES HOMOGENEITY
  /POSTHOC=LSD ALPHA(.05).

Compares means for the same group at two time points (e.g., Pre-test vs. Post-test).

T-TEST PAIRS=PreTest WITH PostTest (PAIRED)
  /CRITERIA=CI(.9500)
  /MISSING=ANALYSIS.

SET SEED 123456.   * for reproducible random results.
SET PRINTBACK ON.
SET MV=OMIT.

To CSV:

SAVE TRANSLATE OUTFILE='C:\exports\data.csv'
  /TYPE=CSV
  /ENCODING='UTF8'
  /MAP
  /REPLACE.

To Excel:

SAVE TRANSLATE OUTFILE='C:\exports\data.xlsx'
  /TYPE=XLSX
  /VERSION=12
  /MAP
  /REPLACE.

Version 26 introduced:

Example: Bayesian one‑sample t‑test

BAYES TTEST
  /TESTVAL=0
  /VARIABLES=Score
  /PRIOR_SCALE=0.707.

SORT CASES BY Age (A).   * Ascending.
SPLIT FILE BY Gender.    * Subsequent analyses run separately per gender.

SET PRINTBACK=OFF.
* your commands here.
SET PRINTBACK=ON.