A contingency analysis table has been constructed from data obtained in a phone survey of customers in a market area in which respondents were asked to indicate whether they owned a domestic or foreign car and whether they were a member of a union or not.

The following contingency table is provided:

Union Car Yes No Domestic 155 470 Foreign 40 325

a. Use the chi-square approach to test whether type of car owned (domestic or foreign) is independent of union membership. Test using an a = 0.05 level.

b. Calculate the p-value for this hypothesis test.