This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
All are true about P-value except- 
Select and explain. 
A. It is the probability of committing type I error, B. I s equal to I-ss, C. Is the chance that the presence of difference is concluded when actually there is none, D. When p-value is less than a, the result is statistically significant
B: I s equal to I-ss
Answer: B: I s equal to I-ss 
Explanation: <p> Is equal to 1-ss. Type 1 error is usually fixed in advance by the choice of level of significance employed in the test. Power of a test:1-ss -is probability of rejecting a null hypothesis when a predetermined clinically significant difference is indeed present. -power can be increased by increasing the no. of subjects in a trial. Reference:Simple Biostatistics by Indrayan & Indrayan,1st edition,page no.155. <\p>