A state housing department is trying to determine if housing prices in county B are lower than in county A. The department decides to randomly sample recently sold houses in both counties and determine what proportion sold for more than $250,000. Since county A is considerably larger than county B, the housing department chose a larger sample from county A. The results of the data collected are shown below. Country A Country B Successes 366 Successes 192 Observations 700 Observations 400 Proportion 0.523 Proportion 0.480 Confidence level 90% P= Ex: 1.234 $ z-score -1.372 p-value 0.085 -3 -2 0 2 3 Z = Ex: 1.234 * County A samples: nA = Ex: 9 County B samples: nB = Sample proportion for county A samples: PA = Ex: 1.234 $ Sample proportion for county B samples: P B =