psych (version 1.0-87)

income: US family income from US census 2008

Description

US census data on family income from 2008

Usage

data(income)

source

US Census: Table HINC-06. Income Distribution to $250,000 or More for Households: 2008

http://www.census.gov/hhes/www/cpstables/032009/hhinc/new06_000.htm

Details

The distribution of income is a nice example of a log normal distribution. It is also an interesting example of the power of graphics. It is quite clear when graphing the data that income statistics are bunched to the nearest 5K. That is, there is a clear sawtooth pattern in the data.

Examples

data(income)
with(income[1:40,], plot(mean,prop, main="US family income for 2008",xlab="income", ylab="Proportion of families",xlim=c(0,100000)))
with (income[1:40,], points(lowess(mean,prop,f=.3),typ="l"))
describe(income)