Consider an Urban Ecologist Who Is Interested in Whether the Presence

question 37

Multiple Choice

Consider an urban ecologist who is interested in whether the presence of high-voltage power lines influences the number of eggs laid by birds nearby. She plans to conduct a two-sample t-test and will assume that the population variances are equal. Her data are as follows:
Near (group 1) : mean = 6.1, SD = 0.35, n = 12
Far (group 2) : mean = 5.8, SD = 0.30, n = 9
What is the pooled sample variance?

• A) 0.099
• B) 0.104
• C) 0.109
• D) 0.114

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Definitions:

Interactions

A process or action taken place when two or more objects or substances influence or have an effect on each other.

Health

A state of complete physical, mental, and social well-being, and not merely the absence of disease or infirmity.

Risk

The possibility of suffering harm, loss, or a negative outcome.

Socially Constructed

Concepts, categories, or practices that exist because individuals or groups of people agree to act as if they exist or agree upon these concepts and invest meaning in them.