One indication of how strong real estate market is performing is the proportion of properties which sell in less than 30 days after being listed. Of condominiums in Florida beach community which sold in the first 6 months of 2006, 71 of the 112 sampled had been on market less than 30 days. For the first six months of 2007, 20 of 81 sampled had been on the market less than 30 days. Compute the appropriate Test Statistic to test the hypothesis that the proportion of condominiums that sold in 30 days reduced from 2006 to 2007.