Suppose data collected by observers at randomly selected intersections accross the country revealed that in a sample of 200 drivers, 50 were using cell phone. A. give a point estimate of p, the true driver cell phone use rate (that is, the true proportion of drivers who are using cell phone while driving). B. compute a 90% confidence interval for p C. Give a piratical interpenetration of the interval, part B. A. Point estimate for P is: B. The 90% confidence interval for p is ? ? C. Interpret the interval