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
Answer to relevant QuestionsEvery year sixth-grade students in Ohio schools take proficiency tests. The list of sixthgrade reading score changes from the prior year are given in Exercise 14. 5. Negative values indicate a decrease in score, positive ...A taste test was conducted with a regular beef pizza. Each of 133 individuals was given two pieces of pizza, one with a whole-wheat crust and the other with a white crust. Each person was then asked whether he or she ...Of the seven Mann–Whitney U test p-values given in Applied Example 14. 8 on page 684, six are less than 0.001 and the seventh is 0.20. Explain how these p-values relate to statements containing phrases such as significant, ...Are more hours spent watching sporting events on television or reality shows? A community college student hypothesized that males more likely watch sports whereas females watch the reality shows. With this premise, he ...The following data were collected in an attempt to show that the number of minutes the city bus is late is steadily growing larger. The data are in order of occurrence. At a = 0.05 do these data show sufficient lack of ...
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