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 conclusion of the t-test?

Question

Quizplus · Accepted Answer

The conclusion to fail to reject the null hypothesis is based on the fact that the question does not provide a specific p-value or critical value to directly compare against, implying that without evidence of a significant difference (which would be indicated by a p-value less than a predetermined significance level, typically 0.05), we cannot conclude that there is a significant difference in the mean number of eggs laid by birds in areas near and far from high-voltage power lines. The choice to fail to reject the null hypothesis is the conservative approach when specific statistical results are not provided.

Consider an Urban Ecologist Who Is Interested in Whether the Presence