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.
If peptic ulcer is located in the stomach it is called gastric ulcer. Literally speaking, an ulcer is an open sore, often infected. Frequently this sore is in the stomach or the duodenum, (the first part of the intestine leading from the stomach) the part of the intestines which connects with the stomach. Peptic ulcers, which are in the stomach and the duodenum can occur at any age and affect both men and women. Untreated, sufferers can look forward to a long siege with them. But today's peptic ulcer sufferers have a brighter prospect for relief than did those of even a single generation ago.