12.6 Optional: Deciding which test to use
This question is optional; e.g., if you need more practice, or you are studying for the exam.
(Answers are available in Sect. A.12)
This question has a video solution in the online book, so you can hear and see the solution.
A study examined the mortality rates within five years of lower-limb amputation, and factors that may be associated with mortality (Singh and Prasad 2016). A summary of the data are shown in Fig. 12.2.
Which tests would have been \(t\)-tests? Which tests would have been chi-square tests? What do the \(P\)-values tell you?
FIGURE 12.2: Summary data from a study of 5-year mortality rates among lower-limb amputees
References
Singh RK, Prasad G. Long-term mortality after lower-limb amputation. Prosthetics and Orthotics International. 2016;40(5).