Out of 11 bihs in a hospital, 5 babies weighed over 2.5 kg and 5 weighed less than 2.5 kg. What value does 2.5 represent:
Geometric average
Arithmetic average
Median average
Mode
The 'median' refers to the value of the middle observation, when data is arranged in an ascending or descending order of magnitude. In the given question, 5 values are greater then '2.5' and 5 values are less than '2.5'. Thus, 2.5 is the middle value of this set of data and stands for the median. Ref: Park's Textbook of Preventive and Social Medicine By K. Park, 19th Edition, Pages 699, 700.