A research analyst wants to test whether the median unemployment rate differs from one region of the

Question:

A research analyst wants to test whether the median unemployment rate differs from one region of the country to another. She collects the unemployment rate (in percent) of similar-sized cities in three regions of the United States. The results are shown in the accompanying table.

a. Specify the competing hypotheses to test whether some differences exist in the median unemployment rates between the three regions.
b. Calculate the value of the test statistic H.
c. At the 10% significance level, what is the critical value?
d. Do some median unemployment rates differ by region? Explain.