Chapter 9, Problem 9P

The distribution of white-blood-cell count is typically positively skewed, and assumptions of normality are usually not valid.

To compare the distribution of white-blood-cell counts of patients on the medical and surgical services in Table 2.13 (p. 36), or in HOSPITAL.DAT, when normality is not assumed, what test can be used?

Table 2.13 Hospital-stay data