Consider the research question: Can training reduce stress in cats when they are getting their blood drawn?
(a) In plain English, write the null and alternative hypotheses of interest to the researcher (regardless of whether or not this is truly testable with these data).
(b) Given the context of this study design, is this research question in (a) testable with these data? Briefly explain.
(c) Use an appropriate t test to test the hypothesis in part (a).
You may use df ≈ 28 and α = 0.05.
(d) Suppose that medically speaking, Cortisol levels that differ by less 1.0 pg/dL are not treated as being different. Do you think we should regard the mean Cortisol levels for trained and untrained cats as being different from a medical (i.e.. practical) perspective? Use the data and an appropriate statistical procedure to support your answer.