Data Dictionary: Census 2000
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Survey: Census 2000
Data Source: U.S. Census Bureau
Table: PCT12I. Sex By Age (White Alone, Not Hispanic Or Latino) [209]
Universe: People who are White alone, not Hispanic or Latino
Table Details
PCT12I. Sex By Age (White Alone, Not Hispanic Or Latino)
Universe: People who are White alone, not Hispanic or Latino
Variable Label
PCT012I001
PCT012I002
PCT012I003
PCT012I004
PCT012I005
PCT012I006
PCT012I007
PCT012I008
PCT012I009
PCT012I010
PCT012I011
PCT012I012
PCT012I013
PCT012I014
PCT012I015
PCT012I016
PCT012I017
PCT012I018
PCT012I019
PCT012I020
PCT012I021
PCT012I022
PCT012I023
PCT012I024
PCT012I025
PCT012I026
PCT012I027
PCT012I028
PCT012I029
PCT012I030
PCT012I031
PCT012I032
PCT012I033
PCT012I034
PCT012I035
PCT012I036
PCT012I037
PCT012I038
PCT012I039
PCT012I040
PCT012I041
PCT012I042
PCT012I043
PCT012I044
PCT012I045
PCT012I046
PCT012I047
PCT012I048
PCT012I049
PCT012I050
PCT012I051
PCT012I052
PCT012I053
PCT012I054
PCT012I055
PCT012I056
PCT012I057
PCT012I058
PCT012I059
PCT012I060
PCT012I061
PCT012I062
PCT012I063
PCT012I064
PCT012I065
PCT012I066
PCT012I067
PCT012I068
PCT012I069
PCT012I070
PCT012I071
PCT012I072
PCT012I073
PCT012I074
PCT012I075
PCT012I076
PCT012I077
PCT012I078
PCT012I079
PCT012I080
PCT012I081
PCT012I082
PCT012I083
PCT012I084
PCT012I085
PCT012I086
PCT012I087
PCT012I088
PCT012I089
PCT012I090
PCT012I091
PCT012I092
PCT012I093
PCT012I094
PCT012I095
PCT012I096
PCT012I097
PCT012I098
PCT012I099
PCT012I100
PCT012I101
PCT012I102
PCT012I103
PCT012I104
PCT012I105
PCT012I106
PCT012I107
PCT012I108
PCT012I109
PCT012I110
PCT012I111
PCT012I112
PCT012I113
PCT012I114
PCT012I115
PCT012I116
PCT012I117
PCT012I118
PCT012I119
PCT012I120
PCT012I121
PCT012I122
PCT012I123
PCT012I124
PCT012I125
PCT012I126
PCT012I127
PCT012I128
PCT012I129
PCT012I130
PCT012I131
PCT012I132
PCT012I133
PCT012I134
PCT012I135
PCT012I136
PCT012I137
PCT012I138
PCT012I139
PCT012I140
PCT012I141
PCT012I142
PCT012I143
PCT012I144
PCT012I145
PCT012I146
PCT012I147
PCT012I148
PCT012I149
PCT012I150
PCT012I151
PCT012I152
PCT012I153
PCT012I154
PCT012I155
PCT012I156
PCT012I157
PCT012I158
PCT012I159
PCT012I160
PCT012I161
PCT012I162
PCT012I163
PCT012I164
PCT012I165
PCT012I166
PCT012I167
PCT012I168
PCT012I169
PCT012I170
PCT012I171
PCT012I172
PCT012I173
PCT012I174
PCT012I175
PCT012I176
PCT012I177
PCT012I178
PCT012I179
PCT012I180
PCT012I181
PCT012I182
PCT012I183
PCT012I184
PCT012I185
PCT012I186
PCT012I187
PCT012I188
PCT012I189
PCT012I190
PCT012I191
PCT012I192
PCT012I193
PCT012I194
PCT012I195
PCT012I196
PCT012I197
PCT012I198
PCT012I199
PCT012I200
PCT012I201
PCT012I202
PCT012I203
PCT012I204
PCT012I205
PCT012I206
PCT012I207
PCT012I208
PCT012I209
Relevant Documentation:
Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 1: Technical Documentation, 2001.
 
Sex
The data on sex were derived from answers to a question that was asked of all people. Individuals were asked to mark either "male" or "female" to indicate their sex. For most cases in which sex was not reported, it was determined by the appropriate entry from the persons given (i.e., first) name and household relationship. Otherwise, sex was imputed according to the relationship to the householder and the age of the person. (For more information on imputation, see "Accuracy of the Data.")

Sex ratio
A measure derived by dividing the total number of males by the total number of females and multiplying by 100.

Comparability
A question on the sex of individuals has been asked of the total population in every census.
For more information on sex, please telephone 301-457-2378.

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 1: Technical Documentation, 2001.
 
Age
The data on age were derived from answers to a question that was asked of all people. The age classification is based on the age of the person in complete years as of April 1, 2000. The age of the person was usually 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.

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.

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 five. 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 aged 69 in 1970 and aged 79 in 1980. Improvements have been made since then in the questionnaire design, and in the allocation procedures which have further minimized these problems. The count of people aged 89 in the 1990 census was not overstated.

Review of detailed 1990 census information indicated that respondents tended to provide their age as of the date they completed 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 one 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 one 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 one to avoid reporting age as zero years. (Age in complete months was not collected for infants under age one.)

The reporting of age one 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.")
For more information on age, please telephone 301-457-2428.

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 1: Technical Documentation, 2001.
 
White
A person having origins in any of the original peoples of Europe, the Middle East, or North Africa. It includes people who indicate their race as White or report entries such as Irish, German, Italian, Lebanese, Near Easterner, Arab, or Polish.

Excerpt from: Social Explorer, U.S. Census Bureau; 2000 Census of Population and Housing, Summary File 1: Technical Documentation, 2001.
 
Hispanic or Latino
The data on the Hispanic or Latino population were derived from answers to a question that was asked of all people. The terms "Spanish,""Hispanic origin," and "Latino" are used interchangeably. Some respondents identify with all three terms while others may identify with only one of these three specific terms. Hispanics or Latinos who identify with the terms "Spanish,"" Hispanic," or "Latino" are those who classify themselves in one of the specific Spanish, Hispanic, or Latino categories listed on the questionnaire ("Mexican,""Puerto Rican," or "Cuban") as well as those who indicate that they are "other Spanish/Hispanic/Latino." People who do not identify with one of the specific origins listed on the questionnaire but indicate that they are "other Spanish, Hispanic, or Latino" are those whose origins are from Spain, the Spanish-speaking countries of Central or South America, the Dominican Republic, or people identifying themselves generally as Spanish, Spanish-American, Hispanic, Hispano, Latino, and so on. All write-in responses to the "other Spanish/Hispanic/Latino" category were coded.

Origin can be viewed as the heritage, nationality group, lineage, or country of birth of the person or the persons parents or ancestors before their arrival in the United States. People who identify their origin as Spanish, Hispanic, or Latino may be of any race. Some tabulations are shown by the origin of the householder. In all cases where the origin of households, families, or occupied housing units is classified as Spanish, Hispanic, or Latino, the origin of the householder is used. (See the discussion of householder under "Household Type and Relationship.")

If an individual could not provide a Hispanic origin response, their origin was assigned using specific rules of precedence of household relationship. For example, if origin was missing for a natural-born daughter in the household, then either the origin of the householder, another naturalborn child, or spouse of the householder was assigned. If Hispanic origin was not reported for anyone in the household, the Hispanic origin of a householder in a previously processed household with the same race was assigned. This procedure is a variation of the general imputation procedures described in "Accuracy of the Data" and is similar to those used in 1990, except for Census 2000 race and Spanish surnames were used to assist in assigning an origin (see the "Comparability" section below also).

Comparability
There are two important changes to the Hispanic origin question for Census 2000. First, the sequence of the race and Hispanic origin questions for Census 2000 differs from that in 1990; in 1990, the race question preceded the Hispanic origin question. Testing prior to Census 2000 indicated that response to the Hispanic origin question could be improved by placing it before the race question without affecting the response to the race question. Second, there is an instruction preceding the Hispanic origin question indicating that respondents should answer both the Hispanic origin and the race questions. This instruction was added to give emphasis to the distinct concepts of the Hispanic origin and race questions, and to emphasize the need for both pieces of information.

Furthermore, there has been a change in the processing of the Hispanic origin and race responses. In the 1990 census, respondents provided Hispanic origin responses in the race question and race responses in the Hispanic origin question. In 1990, the Hispanic origin question and the race question had separate edits; therefore, although information may have been present on the questionnaire, it was not fully utilized due to the discrete nature of the edits. However, for Census 2000 there is a joint race and Hispanic origin edit, which can utilize Hispanic origin and race information that was reported in the inappropriate question.
For more information on Hispanic or Latino, please telephone 301-457-2403.