USpopu {fANCOVA}

US national population

Description

US national population by four groups from 1900 to 1979. The four groups are: Age 0; Age 20; Age 40; Age 60.

Usage

data(USpopu)

Format

A data frame with 320 observations on 3 variables.

age	numeric	the group variable of age
year	numeric	a numeric vector, giving year
population	numeric	a numeric vector, giving population in millions

References

https://www.census.gov/data/tables/time-series/demo/popest/pre-1980-national.html, U.S. Census Bureau, National Intercensal Tables: 1900-1990. Last Revised: November 30, 2016

See Also

T.L2, T.aov, T.var.

Examples

data(USpopu)
t1 <- T.L2(USpopu$year, USpopu$population, USpopu$age, degree=2)
t1
plot(t1)
plot(t1, test.statistic=FALSE, legend.position="topleft")