## 11.6Optional: Deciding which test to use

(Answers are available in Sect. A.11)

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. 11.2.

Which tests would have been $$t$$-tests? Which tests would have been chi-square tests? What do the $$P$$-values tell you?

### References

Singh, Rajiv Kumar, and Guru Prasad. 2016. “Long-Term Mortality After Lower-Limb Amputation.” Prosthetics and Orthotics International 40 (5).