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regression (C1)

カタカナ: リグレッション

IPA: /rɪˈɡreʃən/

A return to a previous, usually worse or less developed, state or condition.

意味: 以前の、通常はより悪く、あるいは未発達な状態や条件に戻ること。

The patient experienced a regression of symptoms after the treatment. — 治療後、患者に症状の退行が見られた。
There has been a disturbing regression in democratic freedoms in the region. — その地域では民主的な自由が不安なほど後退している。
The economic regression caused widespread unemployment. — 経済の後退が広範囲にわたる失業を引き起こした。

Japanese translations of Regression:

regression to the mean (idiom): The statistical phenomenon where extreme results tend to be followed by more average ones. — "After a record-breaking year, the company's performance showed regression to the mean."
regression analysis (collocation): A statistical method to estimate the relationship between variables. — "The report includes a detailed regression analysis of the survey results."