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
[{'content': 'All are true about P-value except ? \nSelect and explain. \nA. It is the probability of commiting type I error, B. Is equal to 1-0, 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', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Is equal to 1-0 P value is equal to the probability of commiting type I error, i.e. observing a difference when there is no difference in real. When P value is less than signficance level (a) , the results are statistically significant. Significance level (c() is fixed in advance. For example, significance level of study is study is fixed at 0.05 and the p value of test (type I error) is 0.027 (< 0.05), then the result is considered as statistically significant. That means, the maximum tolerable limit of type I error (significance level) of a study is fixed in advance and the usual value is 0.05. That means . 0.05 of type I error is acceptable and if a study has 0.05 type I error, the result is statistically significant.", 'role': 'assistant'}]