Data Dictionary: Census 2010
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Survey: Census 2010
Data Source: Census Bureau; Social Explorer
Table: PCT12A. Sex By Age (White Alone) [209]
Universe: People who are White alone
Table Details
PCT12A. Sex By Age (White Alone)
Universe: People who are White alone
Variable Label
PCT012A001
PCT012A002
PCT012A003
PCT012A004
PCT012A005
PCT012A006
PCT012A007
PCT012A008
PCT012A009
PCT012A010
PCT012A011
PCT012A012
PCT012A013
PCT012A014
PCT012A015
PCT012A016
PCT012A017
PCT012A018
PCT012A019
PCT012A020
PCT012A021
PCT012A022
PCT012A023
PCT012A024
PCT012A025
PCT012A026
PCT012A027
PCT012A028
PCT012A029
PCT012A030
PCT012A031
PCT012A032
PCT012A033
PCT012A034
PCT012A035
PCT012A036
PCT012A037
PCT012A038
PCT012A039
PCT012A040
PCT012A041
PCT012A042
PCT012A043
PCT012A044
PCT012A045
PCT012A046
PCT012A047
PCT012A048
PCT012A049
PCT012A050
PCT012A051
PCT012A052
PCT012A053
PCT012A054
PCT012A055
PCT012A056
PCT012A057
PCT012A058
PCT012A059
PCT012A060
PCT012A061
PCT012A062
PCT012A063
PCT012A064
PCT012A065
PCT012A066
PCT012A067
PCT012A068
PCT012A069
PCT012A070
PCT012A071
PCT012A072
PCT012A073
PCT012A074
PCT012A075
PCT012A076
PCT012A077
PCT012A078
PCT012A079
PCT012A080
PCT012A081
PCT012A082
PCT012A083
PCT012A084
PCT012A085
PCT012A086
PCT012A087
PCT012A088
PCT012A089
PCT012A090
PCT012A091
PCT012A092
PCT012A093
PCT012A094
PCT012A095
PCT012A096
PCT012A097
PCT012A098
PCT012A099
PCT012A100
PCT012A101
PCT012A102
PCT012A103
PCT012A104
PCT012A105
PCT012A106
PCT012A107
PCT012A108
PCT012A109
PCT012A110
PCT012A111
PCT012A112
PCT012A113
PCT012A114
PCT012A115
PCT012A116
PCT012A117
PCT012A118
PCT012A119
PCT012A120
PCT012A121
PCT012A122
PCT012A123
PCT012A124
PCT012A125
PCT012A126
PCT012A127
PCT012A128
PCT012A129
PCT012A130
PCT012A131
PCT012A132
PCT012A133
PCT012A134
PCT012A135
PCT012A136
PCT012A137
PCT012A138
PCT012A139
PCT012A140
PCT012A141
PCT012A142
PCT012A143
PCT012A144
PCT012A145
PCT012A146
PCT012A147
PCT012A148
PCT012A149
PCT012A150
PCT012A151
PCT012A152
PCT012A153
PCT012A154
PCT012A155
PCT012A156
PCT012A157
PCT012A158
PCT012A159
PCT012A160
PCT012A161
PCT012A162
PCT012A163
PCT012A164
PCT012A165
PCT012A166
PCT012A167
PCT012A168
PCT012A169
PCT012A170
PCT012A171
PCT012A172
PCT012A173
PCT012A174
PCT012A175
PCT012A176
PCT012A177
PCT012A178
PCT012A179
PCT012A180
PCT012A181
PCT012A182
PCT012A183
PCT012A184
PCT012A185
PCT012A186
PCT012A187
PCT012A188
PCT012A189
PCT012A190
PCT012A191
PCT012A192
PCT012A193
PCT012A194
PCT012A195
PCT012A196
PCT012A197
PCT012A198
PCT012A199
PCT012A200
PCT012A201
PCT012A202
PCT012A203
PCT012A204
PCT012A205
PCT012A206
PCT012A207
PCT012A208
PCT012A209
Notes:
Source: 2000 SF1 PCT12A.
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.
 
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, Arab, Moroccan, or Caucasian.