This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostats, Subject name: Social & Preventive Medicine
Which of the following parametric test can be used for comparing means in more than two different group of individuals:- 
Select and explain. 
A. ANOVA test, B. Unpaired student's t-test, C. Paired student's t-test, D. All of above
A: ANOVA test
Answer: A: ANOVA test 
Explanation: Parametric tests Paired student's t-test Comparing Means, SD in in paired data (1 group) Unpaired students' t-test Comparing Means, SD in in unpaired data (2 groups) ANOVA Comparing Means, SD in in unpaired data (>2 groups) Non parametric tests Chi-square test Comparing percentage, propoions & fractions in in two or more different group of individuals Wilcoxon Signed rank test Comparing percentage, propoions & fractions in matched paired data Wilcoxon Rank sum test Comparing percentage, propoions & fractions in two unpaired samples