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A Researcher Studies Language Development by Selecting a Sample of Two-Year-Old

question 29

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A researcher studies language development by selecting a sample of two-year-old children, a sample of three-year-old children, and a sample of four-year-old children. Each child's language skill is measured and the researcher plans to compare the scores for the three groups. This study is an example of a(n) ____.


Definitions:

Profitable

Generating a financial gain or benefit, exceeding the cost of operation.

Sinclair Lewis

An American novelist and playwright, awarded the Nobel Prize in Literature in 1930, known for his critical views of American society and capitalism.

Main Street

Symbolically represents the average or typical American city or town, especially in the context of small business and community values.

Middle-Class Bigotry

Prejudice and narrow-mindedness often found within the middle socioeconomic class, usually towards those of different social classes, races, or cultures.

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