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Data Dictionary: Census 1970
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Survey: Census 1970
Data Source: Social Explorer & U.S. Census Bureau
Table: T15. Families By Presence Of People Under 18 Years By Household Type [11]
Universe: Count of Families
Table Details
T15. Families By Presence Of People Under 18 Years By Household Type
Universe: Count of Families
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; 1970 Census Users’ Guide; U. S. Government Printing Office, Washington, D. C., 1970.
Family/unrelated individual status
All persons enumerated are classified as family members, unrelated individuals, or inmates of institutions.

Two or more persons living in same household who are related by blood, marriage, or adoption. (No families are recognized in group quarters. ) All persons living in a household related to each other are regarded as one family. For instance, a son of the head and his wife living in the household are treated as part of the heads family.

The number of families does not necessarily equal the number of households, since not all households include families. Families are classified in the complete-count basic records by family size or number of persons in a family from 2 persons to 35 persons. Average number of persons per family is calculated.

Family (primary)
Family whose head is also the household head. In 1970, primary families are simply termed families.

Married couple with or without own children, or one parent with one or more own children (parent-child group), living in a housing unit and related to the household head, but excluding the head (for example, a son, his wife and children, living with the household head). Since subfamily members are counted as part of the heads (primary) family, too, the number of subfamilies is not included in the count of families per seer in any tabulations for families. Census basic records include categories of sub-families by family type.

Secondary family
In 1960, a family in a household whose head was not related to the household head. In 1970, secondary families are not recognized (since there are so few); persons formerly classed as secondary family members are classed as secondary individuals.

Unrelated individual
Persons not living with relatives, but living in a household entirely alone or with one or more persons not related to him, or living in group quarters (excepting inmates of institutions).

Primary individual
Household head living alone or with nonrelatives only. The number of primary individuals living alone equals the number of one-person households.

Secondary individual
Unrelated individual who is not a household head or who lives in group quarters (excepting inmates of institutions).

Excerpt from: Social Explorer; U.S. Census Bureau; 1970 Census Users’ Guide; U. S. Government Printing Office, Washington, D. C., 1970.
Household relationship
Ascertained from replies to a question on relationship to household head. Respondents were asked if they were the head of household, wife of head, son or daughter of head, other relative of head (and to specify exact relationship), roomer, boarder, lodger, patient or inmate, other not related to head (and to specify exact relationship).

Head of household
One person in each household was designated as the head, that is, the person who was reported as the head by the members of the household. However, if a married woman living with her husband was reported as the head, her husband is considered as the head for the purpose of simplifying the tabulations.

Two types of household head are distinguished -- head of a family and primary individual. A family head is a household head living with one or more persons related to him by blood, marriage, or adoption. A primary individual is a household head living alone or with non-relatives only.

Wife of head
A woman married to and living with a household head. This category includes women in common-law marriages as well as women in formal marriages. In complete- count tabulations, the number of wives of head is the same as the number of husband-wife households and the number of husband-wife families. The number does not equal the number of married women, husband present, since it excludes those married women whose husbands are not household heads (as in subfamilies, Concept No. 81.111).

Child of head
A son, daughter, stepchild, or adopted child of the head of the household of which he is a member, regardless of the child's age or marital status. The category excludes sons-in-law and daughters-in-law. (Also see own children Concept No. 84.1. )

Other relative of household head
Household member related to head by blood, marriage, or adoption, but not included specifically in another relationship category. In the sample they are classified as grandchild of head, parent of head or son or daughter-in-law of head, brother or sister of head, parent-in-law of heads or brother or sister-in-law of head and other relative of head, and are identified as separate categories in some tabulations.

Nonrelative of household head
Any household member not related to the head; further classified as lodger, resident employee, and friend or partner. These categories are recorded as sample items only.

Persons identified as roomer, boarder, lodger. In the sample it includes foster children not already identified as roomer, boarder or lodger.

Resident employee
An employee of the household (such as maid, cook, hired farm hand, companion, nurse), who usually resides in the housing unit. Also includes the employees relatives living in the housing unit.

Friend or partner
This is a residual category, including all persons not identified as roomer, boarder, or lodger or resident employee. In tabulations, it is often combined with roomer, boarder, lodger.