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
In a group of 100 children, the weight of a child is 15 kg. The standard error is 1.5 kg. Which one of the following is TRUE - 
Select and explain. 
A. 95% of all children weigh between 12 and 18 kg, B. 95% of all children weigh between 13.5 and 16.5 kg, C. 99% of all children weigh between 12 and 18 kg, D. 99% of all children weigh between 13.5 and 16.5kg
A: 95% of all children weigh between 12 and 18 kg
Answer: A: 95% of all children weigh between 12 and 18 kg 
Explanation: Here the examiner himself has given us the value of standard error = 1.5
So, we can directly apply sample data to the population.
95% of data will be covered by 2 standard error = 15 ± 2 SE = 12 ± 3 = 12 to 18