3.20 Seneta and Phipps (2001) described a medical study that compared subjects with nonacute appendicitis and with acute appendicitis in terms of whether they suffered severe right abdominal pain. Such severe pain was reported by 5 of the 15 nonacute cases and by 1 of the 16 acute cases. The doctors believed that greater density of nerve fibres in the nonacute cases could increase the chance of such pain. Find and interpret the P-value for a one-sided

(a) Fisher's exact test and

(b) unconditional exact test for two binomials.