15) A researcher performed a study to determine whether an association exists between political party affiliation and income. She obtained the following sample data.

We would like to test at the 10% significance level, if the data provide sufficient evidence to conclude that an association exists between political party affiliation and income. State the null and alternative hypothesis and the critical value for the test.

A) H0: Political party affiliation and income areindependent.
     Ha: Political party affiliation and income are not independent.
     Critical value: X2.10 =  6.251.
B) H0: Political party affiliation and income are dependent.
     Ha: Political party affiliation and income are independent.
     Critical value: X2.10 = 7.779.
C) H0: Political party affiliation and income areindependent.
     Ha: Political party affiliation and income are not independent.
     Critical value: X2.10 = 10.645.
D) H0: Political party affiliation and income areindependent.
     Ha: Political party affiliation and income are not independent.
     Critical value: X2.10 = 7.779.