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description: "01 inspect the data"
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Inspect BITM330 Fall2026.csv read-only. Count CSV records with a CSV parser, not by counting physical text lines. Report column names, blank counts, date and class-number issues, and exact duplicate records. Treat one row as one form submission; do not infer unique students or an attendance rate. Do not silently correct dates, deduplicate, or reproduce student free text. Save an aggregate data profile before choosing the analysis.