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When a Greater Proportion of the Total Population Is Sampled

question 7

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When a greater proportion of the total population is sampled for inclusion in the estimation of mean age, the confidence interval for the mean age will be wider because there is greater certainty about the sample mean being close to the population mean.


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Animals that lack a vertebral column, or backbone, including species such as insects, mollusks, and crustaceans.

Human Intelligence

The mental capacity to learn, reason, solve problems, and adapt to new situations.

Francis Galton

A 19th-century English polymath who contributed to fields like statistics, psychology, and anthropology, and is known for his research in eugenics and psychometrics.

Mary Calkins

An early 20th-century psychologist and philosopher known for her work in memory and the first female president of the American Psychological Association (APA).

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