Calculating median age for a group of US census blocks?
Hey Kevin, I don't think you're going to be able to get individual level data from the US Census Bureau. The closest you may be able to get is the current population survey (CPS) which I believe is also available via tidycensus. Regarding your first question, I'm not sure I follow what your objective is with it. I would use a geography of census block groups as the measure of median for census block groups. Otherwise it is unclear how you are defining what a "group of blocks" is. On Mon, Aug 7, 2023 at 2:34?PM Kevin Zembower via R-sig-Geo <
r-sig-geo at r-project.org> wrote:
Hello, all,
I'd like to obtain the median age for a population in a specific group
of US Decennial census blocks. Here's an example of the problem:
## Example of calculating median age of population in census blocks.
library(tidyverse)
library(tidycensus)
counts <- get_decennial(
geography = "block",
state = "MD",
county = "Baltimore city",
table = "P1",
year = 2020,
sumfile = "dhc") %>%
mutate(NAME = NULL) %>%
filter(substr(GEOID, 6, 11) == "271101" &
substr(GEOID, 12, 15) %in% c(3000, 3001, 3002)
)
ages <- get_decennial(
geography = "block",
state = "MD",
county = "Baltimore city",
table = "P13",
year = 2020,
sumfile = "dhc") %>%
mutate(NAME = NULL) %>%
filter(substr(GEOID, 6, 11) == "271101" &
substr(GEOID, 12, 15) %in% c(3000, 3001, 3002)
)
I have two questions:
1. Is it mathematically valid to multiply the population of a block by
the median age of that block (in other words, assign the median age to
each member of a block), then calculate the median of those numbers for
a group of blocks?
2. Is raw data on the ages of individuals available anywhere else in the
census data? I can find tables such as P12, that breaks down the
population by age ranges or bins, but can't find specific data of counts
per age in years.
Thanks for your advice and help.
-Kevin
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