偏差 piānchā bias
bias; deviation
How to remember 偏差: 偏 slanting + 差 differ from = bias.
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How it is used
- A deviation or discrepancy from the correct/expected value - 出现偏差 (chūxiàn piānchā) a deviation arises; 存在偏差 (there's a discrepancy).
- Used for measurement error, statistical bias, or a plan drifting off course.
- Note 差 is chā here. Technical/neutral; near 误差 (wùchā, margin of error) but 偏差 stresses a systematic lean off-target.