Data Dictionary: Census 2000
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Survey: Census 2000
Data Source: U.S. Census Bureau
Table: PCT72B. Age Of Householder By Household Income In 1999 Dollars (Black Alone Householder) [120]
Universe: Households with a householder who is Black or African American alone
Table Details
PCT72B. Age Of Householder By Household Income In 1999 Dollars (Black Alone Householder)
Universe: Households with a householder who is Black or African American alone
Variable Label
PCT072B001
PCT072B002
PCT072B003
PCT072B004
PCT072B005
PCT072B006
PCT072B007
PCT072B008
PCT072B009
PCT072B010
PCT072B011
PCT072B012
PCT072B013
PCT072B014
PCT072B015
PCT072B016
PCT072B017
PCT072B018
PCT072B019
PCT072B020
PCT072B021
PCT072B022
PCT072B023
PCT072B024
PCT072B025
PCT072B026
PCT072B027
PCT072B028
PCT072B029
PCT072B030
PCT072B031
PCT072B032
PCT072B033
PCT072B034
PCT072B035
PCT072B036
PCT072B037
PCT072B038
PCT072B039
PCT072B040
PCT072B041
PCT072B042
PCT072B043
PCT072B044
PCT072B045
PCT072B046
PCT072B047
PCT072B048
PCT072B049
PCT072B050
PCT072B051
PCT072B052
PCT072B053
PCT072B054
PCT072B055
PCT072B056
PCT072B057
PCT072B058
PCT072B059
PCT072B060
PCT072B061
PCT072B062
PCT072B063
PCT072B064
PCT072B065
PCT072B066
PCT072B067
PCT072B068
PCT072B069
PCT072B070
PCT072B071
PCT072B072
PCT072B073
PCT072B074
PCT072B075
PCT072B076
PCT072B077
PCT072B078
PCT072B079
PCT072B080
PCT072B081
PCT072B082
PCT072B083
PCT072B084
PCT072B085
PCT072B086
PCT072B087
PCT072B088
PCT072B089
PCT072B090
PCT072B091
PCT072B092
PCT072B093
PCT072B094
PCT072B095
PCT072B096
PCT072B097
PCT072B098
PCT072B099
PCT072B100
PCT072B101
PCT072B102
PCT072B103
PCT072B104
PCT072B105
PCT072B106
PCT072B107
PCT072B108
PCT072B109
PCT072B110
PCT072B111
PCT072B112
PCT072B113
PCT072B114
PCT072B115
PCT072B116
PCT072B117
PCT072B118
PCT072B119
PCT072B120
Relevant Documentation:
Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Age
The data on age, which was asked of all people, were derived from answers to the long-form questionnaire Item 4 and short-form questionnaire Item 6. The age classification is based on the age of the person in complete years as of April 1, 2000. The age of the person usually was derived from their date of birth information. Their reported age was used only when date of birth information was unavailable.

Data on age are used to determine the applicability of some of the sample questions for a person and to classify other characteristics in census tabulations. Age data are needed to interpret most social and economic characteristics used to plan and examine many programs and policies. Therefore, age is tabulated by single years of age and by many different groupings, such as 5-year age groups.

Median age
Median age divides the age distribution into two equal parts: one-half of the cases falling below the median age and one-half above the median. Median age is computed on the basis of a single year of age standard distribution (see the "Standard Distributions" section under "Derived Measures"). Median age is rounded to the nearest tenth. (For more information on medians, see "Derived Measures".)

Limitation of the data
The most general limitation for many decades has been the tendency of people to overreport ages or years of birth that end in zero or 5. This phenomenon is called "age heaping." In addition, the counts in the 1970 and 1980 censuses for people 100 years old and over were substantially overstated. So also were the counts of people 69 years old in 1970 and 79 years old in 1980. Improvements have been made since then in the questionnaire design and in the imputation procedures that have minimized these problems.

Review of detailed 1990 census information indicated that respondents tended to provide their age as of the date of completion of the questionnaire, not their age as of April 1, 1990. One reason this happened was that respondents were not specifically instructed to provide their age as of April 1, 1990. Another reason was that data collection efforts continued well past the census date. In addition, there may have been a tendency for respondents to round their age up if they were close to having a birthday. It is likely that approximately 10 percent of people in most age groups were actually 1 year younger. For most single years of age, the misstatements were largely offsetting. The problem is most pronounced at age zero because people lost to age 1 probably were not fully offset by the inclusion of babies born after April 1, 1990. Also, there may have been more rounding up to age 1 to avoid reporting age as zero years. (Age in complete months was not collected for infants under age 1.)

The reporting of age 1 year older than true age on April 1, 1990, is likely to have been greater in areas where the census data were collected later in calendar year 1990. The magnitude of this problem was much less in the 1960, 1970, and 1980 censuses where age was typically derived from respondent data on year of birth and quarter of birth.

These shortcomings were minimized in Census 2000 because age was usually calculated from exact date of birth and because respondents were specifically asked to provide their age as of April 1, 2000. (For more information on the design of the age question, see the section below that discusses "Comparability.")

Comparability
Age data have been collected in every census. For the first time since 1950, the 1990 data were not available by quarter year of age. This change was made so that coded information could be obtained for both age and year of birth. In 2000, each individual has both an age and an exact date 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 "Accuracy of the Data.")

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Householder
The data on relationship to householder were derived from the question, "How is this person related to Person 1," which was asked of Persons 2 and higher in housing units. One person in each household is designated as the householder (Person 1). In most cases, the householder is the person, or one of the people, in whose name the home is owned, being bought, or rented. If there is no such person in the household, any adult household member 15 years old and over could be designated as the householder (i.e., Person 1). Households are classified by type according to the sex of the householder and the presence of relatives. Two types of householders are distinguished: family householders and nonfamily householders. A family householder is a householder living with one or more individuals related to him or her by birth, marriage, or adoption. The householder and all of the people in the household related to him or her are family members. A nonfamily householder is a householder living alone or with nonrelatives only.

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Income of households
This includes the income of the householder and all other individuals 15 years old and over in the household, whether they are related to the householder or not. Because many households consist of only one person, average household income is usually less than average family income. Although the household income statistics cover calendar year 1999, the characteristics of individuals and the composition of households refer to the time of enumeration (April 1, 2000). Thus, the income of the household does not include amounts received by individuals who were members of the household during all or part of calendar year 1999 if these individuals no longer resided in the household at the time of enumeration. Similarly, income amounts reported by individuals who did not reside in the household during 1999 but who were members of the household at the time of enumeration are included. However, the composition of most households was the same during 1999 as at the time of enumeration.

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 3: Technical Documentation, 2002.
 
Black or African American
A person having origins in any of the Black racial groups of Africa. It includes people who indicate their race as "Black, African Am., or Negro," or provide written entries such as African American, Afro-American, Kenyan, Nigerian, or Haitian.