In a good experiment, the scientist must be able to measure the values for each variable. Weight or mass is an example of a variable that is very easy to measure. However, imagine trying to do an experiment where one of the variables is love. There is no such thing as a love-meter..
What is 'Overweight'. Overweight is a situation where an investment portfolio holds an excess amount of a particular security when compared to the security's weight in the underlying benchmark portfolio. Actively managed portfolios will make a security overweight when doing so allows the portfolio to achieve excess returns. Overweight can also refer to an investment analyst's opinion that the security will outperform its industry, its sector or the entire market.
The most commonly used measure for overweight and obesity is the Body Mass Index (BMI) - a simple index to classify overweight and obesity in adults. It is defined as the weight in kilograms divided by the square of the height in meters (kg/m2). The BMI provides the most useful population-level measure of overweight and obesity, as it is the same for both sexes and for all ages of adults.