If we do not want to assume normality for these distributions, then what statistical procedure can be used to compare the three groups? 

Gastroenterology

In Table 12.39, we present data relating protein concentration to pancreatic function as measured by trypsin secretion among patients with cystic fibrosis [16].

Table 12.39 Relationship between protein concentration (mg/mL) of duodenal secretions to pancreatic function as measured by trypsin secretion [U/(kg/hr)]

 

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Trypsin secretion [U/(kg/hr)] >1000 51-1000 S 50 Subject number Protein concentration Protein Protein concentration Subject Subject number number concentration 1.7 2.9 3.8 4.4 4.7 5.0 5.6 7.4 1.4 2.4 2.4 3.3 4.4 4.7 6.7 2.0 2.0 2.2 4.0 2 3 4 4 4.0 5.0 6.7 7.8 6. 8. 8. 7.6 8. 9.4 10.3 9.5 10 11.7