Overall, the mean household income in the United States, according to the US Census Bureau 2014 Annual Social and Economic Supplement, was $72,641, or $20,702 (39.86%) higher than the median household income ($51,939).ne key measure is the real median level, meaning half of households have income above that level and half below, adjusted for inflation. According to the Federal Reserve, this measure was $51,939 in 2013, below the 1999 peak of around $57,000.
DEFINITION of 'Geometric Mean'. The average of a set of products, the calculation of which is commonly used to determine the performance results of an investment or portfolio. Technically defined as the 'n'th root product of 'n' numbers, the formula for calculating geometric mean is most easily written as:
Geometric Mean Definition: Geometric mean is a kind of average of a set of numbers that is different from the arithmetic average. The geometric mean is well defined only for sets of positive real numbers.This is calculated by multiplying all the numbers (call the number of numbers n), and taking the nth root of the total.A common example of where the geometric mean is the correct choice is when averaging growth rates.Geometric Mean = ((X1)(X2)(X3)........(XN))1/N.his is calculated by multiplying all the numbers (call the number of numbers n), and taking the nth root of the total. A common example of where the geometric mean is the correct choice is when averaging growth rates. Geometric Mean = ((X1)(X2)(X3)........(XN))1/N.