The ordinal position of an observation in the set of observations of which it is a member
How to Measure your Waist to Hip Ratio
The waist-to-hip ratio (WHR) is the ratio of the circumference of the waist to that of the hip. The proportion of fat stored in the abdominal area to that stored in the hip region is an important indicator of the risk for a number of conditions. These conditions include major health risks such as diabetes, hypertension, and heart disease. A high WHR increases the chances of acquiring these conditions.