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Average and median household income by age group. In 2007, the top 20% of the wealthiest Americans possessed 80% of all financial assets. [14] In 2007 the richest 1% of the American population owned 35% of the country's total wealth, and the next 19% owned 51%.
For modern IQ tests, the raw score is transformed to a normal distribution with mean 100 and standard deviation 15. [4] This results in approximately two-thirds of the population scoring between IQ 85 and IQ 115 and about 2 percent each above 130 and below 70. [5] [6] Scores from intelligence tests are estimates of intelligence.
The age of Earth is estimated to be 4.54 ± 0.05 billion ... later calculated by such means that Earth was about 96 million years ... 4.50 ± 0.07 billion years 3 ...
The highest score obtainable by direct look-up from the standard scoring tables (based on norms from the 1930s) was IQ 171 at various chronological ages from three years six months (with a test raw score "mental age" of six years and two months) up to age six years and three months (with a test raw score "mental age" of ten years and three ...
Using their own definition of baby boomers as people born between 1946 and 1964 and U.S. census data, the Pew Research Center estimated 71.6 million boomers were in the United States as of 2019. [75] The age wave theory suggests an economic slowdown when the boomers started retiring during 2007–2009. [76]
In the United States, as of 2019, the median household income is $60,030 per year and the median household net worth is $97,300, while the mean household income is $89,930 per year and the mean household net worth is $692,100. [2] [3]
A household's income can be calculated in various ways but the US Census as of 2009 measured it in the following manner: the income of every resident of that house that is over the age of 15, including pre-tax wages and salaries, along with any pre-tax personal business, investment, or other recurring sources of income, as well as any kind of governmental entitlement such as unemployment ...
Around 523,000 students between the ages of 15 and 24 drop out of high school each year, a rate of 4.7 percent as of October 2017. [45] In the United States, 75 percent of crimes are committed by high school dropouts. Around 60 percent of black dropouts end up spending time incarcerated. [46]