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.
Overweight is defined as a BMI of 25 or more, thus it includes pre-obesity defined as a BMI between 25 and 30 and obesity as defined by a BMI of 30 or more. Pre obese and overweight however are often used interchangeably thus giving overweight a common definition of a BMI of between 25 -30.