What is ANOVA? Differentiate between One-way and Two-way ANOVA. Comment on its application in Biostatistics. (UPSC 2019, 15 Marks, )

ANOVA क्या है? एक-तरफा और दो-तरफा ANOVA के बीच अंतर करें। बायोस्टैटिस्टिक्स में इसके अनुप्रयोग पर टिप्पणी करें। (What is ANOVA? Differentiate between One-way and Two-way ANOVA. Comment on its application in Biostatistics.)