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
Significance of difference between two proportions is best studied by: 
Select and explain. 
A. 't' test, B. Chi square test, C. ANOVA, D. Regression coefficient
B: Chi square test
Answer: B: Chi square test 
Explanation: Ans: B (Chi square test) Ref: Textbook of Preventive and Social Medicine, K Park,20th edition, page no:755.Explanation:CHI-SQUARE TESTChi-square (x2) Test is the best method for testing the significance of difference between two proportions.It has the advantage that it can also be used when more than two groups are to be compared.