Well to find the z-score we need the standard deviation. #s.d. = sqrt(((.25)(.75))/100) = .043#. then the z-score is: #z = (.20 - .25)/.043 = -1.16#. so the sample is 1.16 standard deviations below the normal rate of Cesareans by 1.16 deviations.
The English word ulcer means an area of tissue erosion. The term peptic ulcer literally means tissue erosion in the digestive system. A symptom is something the patient feels and reports, such as a stomachache, while a sign is something other people, including the doctor detect, such as a rash.hen a peptic ulcer affects the stomach it is called a gastric ulcer, one in the duodenum is called a duodenal ulcer, while an esophageal ulcer is an ulcer in the esophagus. When the lining of these organs is corroded by acidic digestive juices secreted by stomach cells peptic ulcers can form.
1 A peptic ulcer is an ulcer caused by stomach acid. 2  An ulcer occurs where the lining of the gut is damaged and the underlying tissue is exposed. 3  If you could see inside your gut, an ulcer looks like a small, red crater on the inside lining of the gut. Food and acid in the duodenum then leak into the abdominal cavity. 2  This usually causes severe pain and is a medical emergency. 3  Gastroscopy (endoscopy) is the test that can confirm a duodenal ulcer. 4  In this test a doctor or nurse looks inside your stomach and the first part of your small intestine (duodenum).