In a study by Shaked et al. (A-15), researchers studied 26 children with blunt pancreatic injuries.

These injuries occurred from a direct blow to the abdomen, bicycle handlebars, fall from height, or car accident. Nineteen of the patients were classified as having minor injuries, and seven were classified as having major injuries. Pseudocyst formation was suspected when signs of clinical deterioration developed, such as increased abdominal pain, epigastric fullness, fever, and increased pancreatic enzyme levels. In the major injury group, six of the seven children developed pseudocysts while in the minor injury group, three of the 19 children developed pseudocysts. Is this sufficient evidence to allow us to conclude that the proportion of children developing pseudocysts is higher in the major injury group than in the minor injury group? Let a ¼ .01.