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 in the inner lining of the stomach or upper small intestine . Ulcers form when the intestine or stomach's protective layer is broken down. When this happens, digestive juices-which contain hydrochloric acid and an enzyme called pepsin-can damage the intestine or stomach tissue. Treatment cures most ulcers. And symptoms usually go away quickly.