Consider Urban Ecologists Who Are Interested in Whether the Presence

question 29

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 conclusion of the t-test?

• A) Fail to reject the null hypothesis, the mean number of eggs do not seem to differ in the two types of locations.
• B) Fail to reject the null hypothesis, the mean number of eggs seem to differ in the two types of locations.
• C) Reject the null hypothesis, the mean number of eggs do not seem to differ in the two types of locations.
• D) Reject the null hypothesis, the mean number of eggs seem to differ in the two types of locations.