A sample of 276 urban adult residents of a particular state revealed 63 who favored increasing the highway speed limit from 55 to 65 mph, whereas a sample of 177 rural residents yielded 75 who favored the increase. (a) Calculate the point estimate and margin of error for a 95% confidence interval for the difference in parameters p1 − p2, where p1 refers to the true proportion of the urban population that favors increasing the speed limit and p2 refers to the true proportion of the rural population that favors increasing the speed limit.(Round your answers to two decimal places.) Estimate =