Consider Problem 143 again. Suppose that a researcher wants to know if the severity of mental health

Consider Problem 143 again. Suppose that a
researcher wants to know if the severity of mental health symptoms is different
for rural and urban adolescents.

(a) Does the information in Problem give us
enough information to test the null hypothesis that the mean ranks of severity
are the same for rural and urban adolescents? Why or why not?

(b) Use the Wilcoxon rank sum test to test
the null hypothesis that the mean ranks of severity are the same for rural and
urban adolescents. Use α = 0.05.

(c) How is the hypothesis tested in (b)
different than the hypothesis tested in (b)?