Data Dictionary: Census 2010
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Survey: Census 2010
Data Source: Census Bureau; Social Explorer
Table: P12D. Sex By Age (Asian Alone) [49]
Universe: People who are Asian alone
Table Details
P12D. Sex By Age (Asian Alone)
Universe: People who are Asian alone
Variable Label
P012D001
P012D002
P012D003
P012D004
P012D005
P012D006
P012D007
P012D008
P012D009
P012D010
P012D011
P012D012
P012D013
P012D014
P012D015
P012D016
P012D017
P012D018
P012D019
P012D020
P012D021
P012D022
P012D023
P012D024
P012D025
P012D026
P012D027
P012D028
P012D029
P012D030
P012D031
P012D032
P012D033
P012D034
P012D035
P012D036
P012D037
P012D038
P012D039
P012D040
P012D041
P012D042
P012D043
P012D044
P012D045
P012D046
P012D047
P012D048
P012D049
Notes:
Source: 2000 SF1 P12D.
Relevant Documentation:
Excerpt from: Social Explorer, U.S. Census Bureau; 2010 Census of Population and Housing, Summary File 1: Technical Documentation, Issued June 2011.
 
Sex
Individuals were asked to mark either "male&quot or "female" to indicate their sex. For most cases in which sex was not reported, the appropriate entry was determined from the persons given (i.e., first) name and household relationship. Otherwise, sex was allocated according to the relationship to the householder and the age of the person. (For more information on allocation, see "2010 Census: Operational Overview and Accuracy of the Data.")


Sex Ratio
The sex ratio represents the balance between the male and female populations. Ratios above 100 indicate a larger male population, and ratios below 100 indicate a larger female population. This measure is derived by dividing the total number of males by the total number of females and then multiplying by 100. It is rounded to the nearest tenth.

Comparability
A question on the sex of individuals has been asked of the total population in every census.

Excerpt from: Social Explorer, U.S. Census Bureau; 2010 Census of Population and Housing, Summary File 1: Technical Documentation, Issued June 2011.
 
Age
The data on age were derived from answers to a two-part question (i.e., age and date of birth). The age classification for a person in census tabulations is the age of the person in completed years as of April 1, 2010, the census reference date. Both age and date of birth responses are used in combination to
determine the most accurate age for the person as of the census reference date. Inconsistently reported and missing values are assigned or allocated based on the values of other variables for that person, from other people in the household or from people in other households (i.e., hot-deck imputation).
Age data are tabulated in age groupings and single years of age. Data on age also are used to classify other characteristics in census tabulations.


Median Age
This measure divides the age distribution into two equal parts: one-half of the cases falling below the median value and one-half above the value. Median age is computed on the basis of a single-year-of-age distribution using a linear interpolation method.

Limitation of the data
There is some tendency for respondents to provide their age as of the date they completed the census questionnaire or interview, not their age as of the census reference date. The two-part question and editing procedures have attempted to minimize the effect of this reporting problem on tabulations. Additionally, the current census age question displays the census reference date prominently, and interviewer training emphasizes the importance of collecting age as of the reference date.

Respondents sometimes round a persons age up if they were close to having a birthday. For most single years of age, the misstatements are largely offsetting. The problem is most pronounced at age 0. Also, there may have been more rounding up to age 1 to avoid reporting age as 0 years. (Age in completed months was not collected for infants under age 1.) Editing procedures correct this problem.

There is some respondent resistance to reporting the ages of babies in completed years (i.e., 0 years old when the baby is under 1 year old). Instead, babies ages are sometimes reported in months. The two-part question along with enhanced editing and data capture procedures correct much of this problem before the age data are finalized in tabulations. Additionally, the current census age question includes an instruction for babies ages to be answered as 0 years old when they are under 1 year old.

Age heaping is a common age misreporting error. Age heaping is the tendency for people to overreport ages (or years of birth) that end in certain digits (commonly digits 0 or 5) and underreport ages or years of birth ending in other digits. The two-part question helps minimize the effect of age heaping on the final tabulations.

Age data for centenarians have a history of data quality challenges. The counts in the 1970 and 1980 Censuses for people 100 years and over were substantially overstated. Editing and data collection methods have been enhanced in order to meet the data quality challenges for this population.

It also has been documented that the population aged 69 in the 1970 Census and the population aged 79 in the 1980 Census were overstated. The population aged 89 in 1990 and the population aged 99 in 2000 did not have an overstated count. (For more information on the design of the age question, see the Comparability section below.)

Comparability
Age data have been collected in every census. However, there have been some differences in the way they have been collected and processed over time. In the 2010 Census (as in Census 2000), each individual provided both an age and an exact date of birth. The 1990 Census collected age and year of birth. Prior censuses had collected month and quarter of birth in addition to age and year of birth. The 1990 Census change was made so that coded information could be obtained for both age and year of birth.

In each census since 1940, the age of a person was assigned when it was not reported. In censuses before 1940, with the exception of 1880, people of unknown age were shown as a separate category. Since 1960, assignment of unknown age has been performed by a general procedure described as imputation. The specific procedures for imputing age have been different in each census. (For more information on imputation, see 2010 Census: Operational Overview and Accuracy of the Data.)

Excerpt from: Social Explorer, U.S. Census Bureau; 2010 Census of Population and Housing, Summary File 1: Technical Documentation, Issued June 2011.
 
Asian
A person having origins in any of the original peoples of the Far East, Southeast Asia, or the Indian subcontinent, including, for example, Cambodia, China, India, Japan, Korea, Malaysia, Pakistan, the Philippine Islands, Thailand, and Vietnam. It includes people who indicate their race as Asian Indian,Chinese,Filipino,Korean,Japanese,Vietnamese, and Other Asian or provide other detailed Asian responses.
    Asian Indian-Includes people who indicate their race as Asian Indian or report entries such as India or East Indian.
    Bangladeshi-Includes people who provide a response such as Bangladeshi or Bangladesh.
    Bhutanese-Includes people who provide a response such as Bhutanese or Bhutan.
    Burmese-Includes people who provide a response such as Burmese or Burma.
    Cambodian-Includes people who provide a response such as Cambodian or Cambodia.
    Chinese-Includes people who indicate their race as Chinese or report entries such as China or Chinese American. In some census tabulations, written entries of Taiwanese are included with Chinese, while in others they are shown separately.
    Filipino-Includes people who indicate their race as Filipino or report entries such as Philippines or Filipino American.
    Hmong-Includes people who provide a response such as Hmong or Mong.
    Indonesian-Includes people who provide a response such as Indonesian or Indonesia.
    Japanese-Includes people who indicate their race as Japanese or report entries such as Japan or Japanese American.
    Korean-Includes people who indicate their race as Korean or report entries such as Korea or Korean American.
Definitions of Subject Characteristics B-9U.S. Census Bureau, 2010 Census Summary File 1
    Laotian-Includes people who provide a response such as Laotian or Laos.
    Malaysian-Includes people who provide a response such as Malaysian or Malaysia.
    Nepalese-Includes people who provide a response such as Nepalese or Nepal.
    Pakistani-Includes people who provide a response such as Pakistani or Pakistan.
    Sri Lankan-Includes people who provide a response such as Sri Lankan or Sri Lanka.
    Taiwanese-Includes people who provide a response such as Taiwanese or Taiwan.
    Thai-Includes people who provide a response such as Thai or Thailand.
    Vietnamese-Includes people who indicate their race as Vietnamese or report entries such as Vietnam or Vietnamese American.
    Other Asian, specified-Includes people who provide a response of another Asian group, such as Iwo Jiman, Maldivian, Mongolian, Okinawan, or Singaporean.
    Other Asian, not specified-Includes respondents who checked the Other Asian response category on the census questionnaire and did not write in a specific group or wrote in a generic term such as Asian or Asiatic.