1 (If you don't know what these, are set them each to 0.5. 2  z is the value that specifies the level of confidence you want in your confidence interval when you analyze your data. 3  Typical levels of confidence for surveys are 95%, in which case z is set to 1.96. 4  E sets the accuracy of your sample proportions.
Tests and diagnosis discussion for Gallstones: Many gallstones, especially silent stones, are discovered by accident during tests for other problems. But when gallstones are suspected to be the cause of symptoms, the doctor is likely to do an ultrasound exam. Ultrasound uses sound waves to create images of organs.
The MRCP test is known as the Magnetic Resonance Cholangiopancreatography test. The MRCP test is used to generate images of the pancreas, the gall bladder, the bile ducts, the liver and the pancreatic ducts.The MRCP test for gallstones is thus usually recommended for many.he MRCP test is used to generate images of the pancreas, the gall bladder, the bile ducts, the liver and the pancreatic ducts. The MRCP test for gallstones is thus usually recommended for many.