Consider Urban Ecologists Who Are Interested in Whether the Presence

question 12

Multiple Choice

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

• A) 1.83
• B) 1.95
• C) 2.03
• D) 2.11

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