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.
A peptic ulcer is a sore or hole in the lining of the stomach. 1  A duodenum ulcer is a sore or hole in the beginning of the small intestine. 2  Stress and spicy food do not cause ulcers. Ulcers can be caused by a bacterial infection (called h. pylori) or by using certain drugs, like aspirin or ibuprofen. A person of any age can get an ulcer but they are most common in adults. Symptoms of an ulcer can include a burning pain in the stomach, chest pain, vomiting, or blood in the stools or vomit. The bacteria that can cause peptic ulcers are contagious. Peptic ulcers are most often treated with antibiotics. Treatment usually lasts about 2 weeks. The ulcer may take 8 weeks to heal.