Question: An article titled Graft versus Host Disease http www nature com gives the median age
An article titled “Graft-versus-Host Disease” (http://www.nature.com/) gives the median age of 42 years for the 87 patients with acute myeloid leukemia (AML) who received hematopoietic stem cell transplants from unrelated donors after standard conditioning. Clinical outcome after the use of two different antithymocyte globulins (ATG) for the prevention of graft-versus-host disease (GvHD) were then analyzed. Suppose that a sample of 100 patients with AML was recently selected for a study and it found that 40 of the patients were older than 42 and 60 were younger than 42 years of age. Test the null hypothesis that the median age of the population from which the 100 patients were selected equals 42 years versus the alternative, that the median does not equal 42 years. Use a = 0.05
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