This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Amount of Alcohol consumption amongst a group of Alcoholics, before and after intervention was recorded. The most appropriate statistical test to assess 'significant change' from the intervention programme would be - 
Select and explain. 
A. Paired t test, B. Unpaired t test, C. Chisquare Test, D. McNemar Test
A: Paired t test
Answer: A: Paired t test 
Explanation: Ans. is 'a' i.e., Paired t test The recommended test for 'within group' comparisons such as comparison between Pre-intervention and Post-intervention values of the same group (such that every paicipant is in both groups) is the paired 't' test (Dependent `I' test).