Analysis of variance (ANOVA) compares how many group means?

Analysis of variance (ANOVA) compares how many group means? Options: (a) Three or more (b) Two or more (c) None of the above (d) All of these ✅ Correct Option: (a) Three or more Explanation (200+ words): ANOVA is used to compare the means of three or more groups simultaneously. Comparing only two groups is done using a t-test. ANOVA reduces error risk and improves efficiency. 10 PPSC-Related Facts: 1. ANOVA compares group means 2. Used for three or more groups 3. Reduces Type I error 4. Developed by Fisher 5. Used in experimental research 6. Tests overall differences 7. Requires assumptions 8. Used in education research 9. F-ratio is calculated 10. Common statistical tool