This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Statistical Tests, Subject name: Social & Preventive Medicine
Test used to compare two qualitative data is - 
Select and explain. 
A. Paired T-test, B. Unpaired T-test, C. Chi-square test, D. AVOVA
C: Chi-square test
Answer: C: Chi-square test 
Explanation: Ans. is 'c' i.e., Chi-square test Commonly used Statistical tests Data || | Qualitative(Proportions, percentage, fractions) Quantitative(mean & SD. of BP, Sugar, cholesterol etc) | | | || |Large sample size < 20% of cells have expected value below 5Small sample size > 20% of cells have expected values below 5Two sample group comparisonMore than 2 sample groups ||||||||||||||||||||||||||||| | |Sample is smallSample is large (n > 30)|||||Chi-squaretest Fisher's exact testStudent't-test' Z-testANOVA