1 If the test statistic follows the t distribution, then the decision rule will be based on the t distribution. The appropriate critical value will be selected from the t distribution again depending on the specific alternative hypothesis and the level of significance.  The third factor is the level of significance.
Often there are no, or only mild, symptoms. When it affects the lungs there may be wheezing, cough, shortness of breath, or chest pain. Some may have Lofgren's syndrome in which there is fever, large lymph nodes, arthritis, and a rash known as erythema nodosum. The cause of sarcoidosis is unknown.
Signs and Symptoms of Sarcoidosis. Sarcoidosis is usually asymptomatic, which means there are no outward signs that the person has the disease. This is why so many cases of sarcoidosis are discovered by chance during a routine x-ray. When symptoms appear, the most common are: