2. An environmental survey contained a question asking what respondents thought was the major cause of air pollution in this country, giving the choices \"automobiles,\" \"factories,\" and \"incinerators." Two versions of the test, A and B, were used. Let pa and pr; be the respective proportions of people using forms A and B who select \"factories." Suppose 170 out of 460 people who used version A chose \"factories" and 141 out of 440 people who used version B chose \"factories\". Test whether the two versions of the test, A and B, are consistent