The General Social Survey conducted a poll of 668 adults in which the subjects were asked whether they agree that the government should prohibit smoking in public places.

In addition, each was asked how many people lived in his or her household. The results are summarized in the following contingency table.

a. Compute the expected frequencies.

b. Compute the value of the test statistic.

c. How many degrees of freedom are there?

d. Test the hypothesis of independence. Use the α = 0.01 level of significance. What do you conclude?

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Household Size 1 2 3 4 5 Agree 73 109 48 37 37 No Opinion 31 52 29 20 18 Disagree 42 71 38 40 23