A local politician was interested in determining whether income level affects op

Question

A local politician was interested in determining whether income level affects opinion regarding the government's bailout bill for easing the 2008 financial crisis on Wall Street. He surveyed a sample of his constituent groups and got the following Opinion results. The correct null hypothesis to be tested could be stated as I. Opinion are not different for all income groups II. Opinion distributions are the same for all income groups III. There is a relationship between income level and opinion. IV. Opinion and income are not related A) II and IV B) I and III C) I and IV D) I and II

Explanation / Answer

Here chi sqaures test of independence will be used with following null hypothesis

H0 : Opinion and income are independent from each other.

This can also be written as option II and IV.

So answer is A.

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