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.
Peptic ulcer disease is characterized by sores, or ulcerations, in the lining tissues of the stomach or the duodenum, the first portion of the small intestine. The primary symptom of peptic ulcer is upper abdominal pain. The pain can be sharp or dull and is often described as burning. Some affected people have indigestion that may quickly resolve after taking antacids or eating foods that neutralize stomach acids. Other people with peptic ulcers may not have symptoms at all or may have only very mild symptoms. The severity of the ulcers is not related to the severity of the symptoms they cause; mild ulcers may cause severe pain, while severe ulcers may only cause mild symptoms.