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.
Lung cancer symptoms. Early symptoms and signs of lung cancer. There may be no symptoms at the onset of the disease. When present, common symptoms of lung cancer may include: 1  Coughing: This includes a persistent cough that doesn't go away or changes to a chronic smoker's cough,â such as more coughing or pain. 2  Coughing up blood: Coughing up blood or rust-colored sputum (spit or phlegm) should always be discussed with your doctor.