This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2017, Subject name: Social & Preventive Medicine
All of the following are true regarding increasing sample size except:- 
Select and explain. 
A. Decreases power of test, B. Standard error of mean decreases, C. Decrease in Confidence interval, D. Decreases alpha error
A: Decreases power of test
Answer: A: Decreases power of test 
Explanation: Increase in sample size leads to: Decrease in Confidence interval i.e., gives more precise estimates. Decrease in Alpha error i.e, less chance of type 1 error. Decrease in Standard error of mean. Increase in Power of test.