The null hypothesis in the test for independence is
A)the data fit the expected frequencies.
B)the data do not fit the expected frequencies.
C)the variables are independent.
D)the variables are dependent.

Question

The null hypothesis in the  test for independence is
A)the data fit the expected frequencies. 
B)the data do not fit the expected frequencies. 
C)the variables are independent. 
D)the variables are dependent.

Quizplus · Accepted Answer

The null hypothesis in the chi-square test for independence is that the variables are independent. Therefore, the correct choice is C. Choice A is incorrect because it describes the alternative hypothesis. Choice B is incorrect because it implies that the data do not fit the expected frequencies, which is the opposite of what we expect under the null hypothesis. Choice D is incorrect because it describes the alternative hypothesis.

The Null Hypothesis in the Test for Independence Is