誤差

1. Origins, structure, and basic meaning

• Structure: The quantitative noun 誤差 (ごさ) is a discrepancy between measurements or between a measured value and a reference.
• Basic usage: A quantity can precede it, as in 三秒の誤差, and measurement work may aim to 誤差を小さくする.

2. Common pitfalls and similar expressions

• Measurement discrepancy
  • It focuses on a numerical difference between a measured or calculated result and a reference, not the careless act of making a mistake.