Although starting salaries are in a fairly narrow band, d& y wonders whether they have anything to do with retention. calculate a 95% confidence interval for the mean starting salary of all employees who stay at least three years with d& y. do the same for those who leave before three years. then calculate a 95% confidence interval for the difference between these means.

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Through non-collinear points there is exactly one plane.

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test