Okay, the user sent "co-variate". Let me check the translation rules again. The first rule is to translate all content into Vietnamese. The second says if it's already in Vietnamese, leave it as is. The third is to provide only the translation without explanations.
So, "co-variate" is an English term. I need to translate it into Vietnamese. The correct Vietnamese term for "co-variate" is "biến đồng phương sai" or "biến phụ thuộc". Wait, maybe "biến đồng phương sai" is more accurate here. Let me confirm. Co-variate refers to a variable that is considered alongside another variable in a statistical analysis. In Vietnamese, that's often translated as "biến đồng phương sai" or "biến phụ thuộc". But I think "biến đồng phương sai" is the standard term used in statistics. So the translation should be "biến đồng phương sai".
I should make sure there's no existing Vietnamese content here. Since the input is in English, I need to translate it. The user wants only the translation, no explanations. So the response should be just "biến đồng phương sai".