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': 'Median is- \nSelect and explain. \nA. Middle most value in sequentially arranged data, B. Most frequently occurring value in a data set, C. Highest value in a data, D. Lowest value in a data', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The median \n\nA median is described as a value separating the higher half of a data set from the lower half.\n\nIt does not depend on the total and number of items.\n\nTo obtain the median,\xa0the data is first arranged in an ascending or descending order of magnitude, and then the value of the middle observation is located, which is called median.\n\nFor example, diastolic BP of 9 individuals was as follows – 83, 75, 81, 79,71, 95, 75, 77, 84. Now data is arranged in ascending order – 71, 75, 75, 77, 79, 81, 83, 84, 95.\xa0Here, 79 is the middle observation that is separating the upper four values from the lower four values, so it is the median.\xa0\nIf there are two values in the middle instead of one, the median is worked out by taking the average of the two middle values.\nFor example, If diastolic BP of 10 individuals is as follows 83, 75, 81, 79, 71, 95, 75, 77, 84, 90. Data is arranged in ascending order – 71, 75, 75, 77, 79, 81, 83, 84, 90, 95\nHere two values are separating the upper half of values from the lower half. So the median here is - Median = (79 + 81) / 2 = 80. \nAdvantage of median\n\nThe value of the median is not affected by abnormal very high or very low value. \n\nTaking the example as was taken in the mean – The income of 7 people per day in rupees is as follows 5, 5, 5, 7, 10, 20, 300 = (Total 352) Here mean = 50.3, median = 7.\xa0The value of mean has affected seriously, whereas the median is not affected, and the median is more nearer to the truth.\xa0So, the median is used when the distribution of values is skewed (deviated) with some small number of very high values → median is used for skewed distribution.', 'role': 'assistant'}]