After Defining the Variables Involved in a Study, Scientists Have

question 1

Essay

After defining the variables involved in a study, scientists have to identify individuals to study. The population is the group of individuals to whom we hope our conclusions will apply. Researchers generally hope that their conclusions will apply to a large population, such as all 5-year-olds or all people with schizophrenia. Because it is not practical to examine everyone in the population, researchers study a sample of people and assume that the results for the sample apply to the whole population. Briefly define the following types of samples and give one example for each; convenience sample, representative sample, random sample, and cross cultural sample.

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Definitions:

Homeless

The homeless are individuals who lack stable, permanent, and adequate housing.

$2 A Day

A poverty threshold that delineates extreme poverty by the metric of living on less than $2 per day, adjusted for purchasing power parity.

Largest Poverty Group

refers to the demographic segment within a society that accounts for the largest share of individuals living below the poverty line.

Black Americans

A racial or ethnic group in the United States with African ancestry, known for its rich cultural heritage and history of civil rights struggle.