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.
A raised lesion less than 1/5 in (5 mm) across and filled with a clear fluid. Vesicles that are more than 1/5 in (5 mm) across are called bullae or blisters. These lesions may may be the result of sunburns, insect bites, chemical irritation, or certain viral infections, such as herpes.