13) 6 points Pollution and altitude: In a random sample of 346 cars driven at low altitudes, 51 of them exceeded a standard of 11 grams of particulate pollution per gallon of fuel consumed. In an independent random sample of 80 cars driven at high altitudes, 20 of them exceeded the standard. Can you conclude that the proportion of high-altitude vehicles exceeding the standard differs from the proportion of low-altitude vehicles exceeding the standard? Let p denote the proportion of low-altitude vehicles exceeding the standard and P2 denote the proportion of high-altitude vehicles exceeding the standard. Use the = 0.05 level of significance and the P-value method with the TI-84 Plus calculator. ==