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.
Definition of peptic ulcer. medical. : a painful sore inside the stomach or another part of the digestive system.