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What's the difference between your C and the option D (use the 90 samples) If I got 120 rows, where 30 was NULL, I'd throw those 30 away.
by wodenokoto 4y ago
What's the difference between your C and the option D (use the 90 samples)
If I got 120 rows, where 30 was NULL, I'd throw those 30 away.
- pestatije 4y agoThose 30 are not NULL, they're "chose not to answer", usually classified as "don't know / won't answer"