Consider an Urban Ecologist Who Is Interested in Whether the Presence

question 30

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
Based on the t-test statistic, and using your table of critical t-values, which of the following P-value ranges matches the one for the t-value?

• A) 0.05 < p
• B) 0.02 < p < 0.05
• C) 0.01 < p < 0.02
• D) p < 0.01

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Definitions:

Voltmeter

An instrument used for measuring the electrical potential difference between two points in an electric circuit.

Patch Technique

A laboratory method used to study ion channels in cells by isolating a small patch of cell membrane and measuring its electrical properties.

Positive Pole

In electrical terminology, the terminal of a battery or device from which current flows out, having a higher electrical potential.