If the p value is less than or equal to, we reject the null hypothesis, otherwise we do not reject the null hypothesis. One tail and two tail tests. In a one tail test, the rejection region is at one end of the distribution or the other.In a two tail test, the rejection region is split between the two tails.4) Test statistic. As the population variance is known, we use z as the test statistic. (a) Distribution of test statistic. If the assumptions are correct and is true, the test statistic follows the standard normal distribution.
Cameron lesions are linear erosions or ulcerations of the mucosal folds lining the stomach where it is constricted by the thoracic diaphragm in persons with large hiatal hernias. The lesions may cause chronic blood loss resulting in iron deficiency anemia; less often they cause acute bleeding.
Does it mean you need immediate treatment? Does it mean that you are okay and donât need to do anything? According to DermIS, a precancerous lesion is a change in some areas of your skin that carries the risk of turning into skin cancer. It is a preliminary stage of cancer. [1] Although not all precancerous lesions turn into cancer, many doctors treat these lesions proactively, removing the lesion before it has a chance to turn into cancer. Some of the most common types of precancerous lesions are: Acitinic Keratosis is the most common type of precancerous lesion. They usually appear in areas of the body that have been exposed to the sun. These lesions often appear as red or flesh colored scaly areas or could look similar to a wart.