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 and obesity are defined as abnormal or excessive fat accumulation that may impair health. Body mass index (BMI) is a simple index of weight-for-height that is commonly used to classify overweight and obesity in adults.It is defined as a person's weight in kilograms divided by the square of his height in meters (kg/m2). The WHO definition is: 1  a BMI greater than or equal to 25 is overweight. Of these over 600 million were obese. 2  39% of adults aged 18 years and over were overweight in 2014, and 13% were obese. 3  Most of the world's population live in countries where overweight and obesity kills more people than underweight. 4  42 million children under the age of 5 were overweight or obese in 2013.