Persons of Spanish Origin in the United States, Issue 310

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U.S. Department of Commerce, Bureau of the Census, 1977
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Page 55 - Data reliability The data in this bulletin are estimates from a scientifically selected probability sample. There are two types of errors possible in an estimate based on a sample survey, sampling and nonsampling. Sampling errors occur because observations come only from a sample and not from an entire population. The sample used for this survey is one of a number of possible samples of the same size that could have been selected using the sample design. Estimates derived from the different samples...
Page 13 - family,' as used here, refers to a group of two or more persons related by blood, marriage, or adoption and residing together; all such persons are considered as members of the same family.
Page 12 - SMSA is a county or group of contiguous counties which contains at least one city of 50,000 inhabitants or more, or "twin cities" with a combined population of at least 50,000.
Page 13 - A household includes the related family members and all the unrelated persons, if any, such as lodgers, foster children, wards, or employees who share the housing unit. A person living alone in a housing unit, or a group of unrelated persons sharing a housing unit as partners, is also counted as a household.
Page 13 - ... twin cities" with a combined population of at least 50,000. In addition to the county, or counties, containing such a city or cities, contiguous counties are included in an SMSA if, according to certain criteria, they are essentially metropolitan in character and are socially and economically integrated with the central city.
Page 14 - ... an elementary or high school diploma or a college, university, or professional school degree.
Page 19 - ... years 20 and 21 years 22 to 24 years 25 to 29 years 30 to 34 years 35 to...
Page 14 - Professional, technical, and kindred workers; managers and administrators, except farm; sales workers; and clerical and kindred workers.
Page 14 - Labor force. Persons are classified as in the labor force if they were employed as civilians, unemployed, or in the Armed Forces during the survey week. The "civilian labor force" is comprised of all civilians classified as employed or unemployed.
Page 14 - Employed persons comprise all civilians 16 years old and over who were either (a) "at work"— those who did any work at all as paid employees or in their own business or profession, or on their own farm, or who worked 15 hours or more as unpaid workers on a family farm or in a family business; or (b) were "with a job but not at work...

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