Biostatistics in research methodology

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Dear Members, Centiles allow us to describe the central range of a group of numbers. They are often expressed as the 25th and 75th centiles, although it is possible to calculate centiles of any value (e.g. 3rd and 97th centiles. Centiles are also referred to as percentiles. The interquartile range is the distance between the 25th and 75th centiles, and is calculated by simply subtracting the 25th centile from the 75th centile. It provides an indication of how much variation (or spread) there is between the first and third quartiles. It ignores the values below the first quartile and above

the third quartile.Regards,Dr. Vijaya Chaudhari.JR-3,Dept. of Pharmacology,Government Medical College, Nagpur.