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:
The geometric mean of a data set is less than or equal to the data set's arithmetic mean (the two means are equal if and only if all members of the data set are equal). Geometric Mean is one of the measures of central tendency.The geometric mean of $n$ items is defined as the $n^{th}$ root of the product of the $n$ items. A measure of central tendency is a single value in the range of the data that is used to represent all the values in the series.eometric Mean is the square root of the product of the two numbers. When $a, b, c$ are in Geometric progression, $b$ is the geometric mean of $a$ and $c$.