Data Dictionary: Census 1980
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Survey: Census 1980
Data Source: U.S. Census Bureau
Table: T92. Aggregate Income (In 1979 Dollars) [3]
Universe: Persons 15 Years And Over
Table Details
T92. Aggregate Income (In 1979 Dollars)
Universe: Persons 15 Years And Over
Variable Label
T092_001
T092_002
T092_003
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; Census of Population and Housing, 1980: Summary Tape File 3 [machine-readable data file] / conducted By the U.S. Bureau of the Census. Washington: Bureau of the Census [producer and distributor], 1982.
 
Mean income
The mean income is the amount obtained by dividing the total income of a particular statistical universe (termed "aggregate income" in STF documentation) by the number of units in that universe. Thus, mean family income is obtained by dividing total family income by the total number of families. Mean income for persons is obtained by dividing the total income of persons (including patients or inmates in institutional quarters) by the number of persons with income. When the mean income for an area or population subgroup is a net loss, the dollar amount is shown preceded by a sinus sign (e.g., -$123).

Care should be exercised in using and interpreting mean income values in the statistics for small subgroups of the population. Since the mean is strongly influenced by extreme values in the distribution, it is especially susceptible to the effects of sampling variability, misreporting, and processing errors. The median is not affected by extreme values and is, therefore, a better measure than the mean when the population base is small. The mean, nevertheless, is shown for most small-area tabulations because, when weighted according to the number of cases, the means can be added to obtain summary measures for areas and groups other than those shown.

Excerpt from: Social Explorer; U.S. Census Bureau; Census of Population and Housing, 1980: Summary Tape File 3 [machine-readable data file] / conducted By the U.S. Bureau of the Census. Washington: Bureau of the Census [producer and distributor], 1982.
 
Inmate of institution
A person under care or custody at the time of enumeration. Inmates are persons in such facilities as homes, schools, hospitals, or wards for the physically or mentally handicapped; persons in hospitals or wards for mental, tubercular, or chronic diseases; persons in homes for unmarried mothers; persons in nursing, convalescent, and rest homes for the aged and dependent; persons in orphanages; and persons in correctional institutions. These persons are enumerated as residents of an institution--regardless of their length of stay in the particular place and regardless of the number of people in the places. Some tabulations include data by major types of institutions (home for the aged, mental hospital, correctional institution and other institutions).