Suppose data collected by observers at randomly selected intersections across the country revealed that in a sample of 1000 drivers, 380 were using their cell phone. a. Give a point estimate of 11:, the true driver cell phone use rate (that is, the true proportion- or population porportion- of drivers who are using their cell phone while driving). b. Compute a 90% condence interval for it. c. Give a practical interpretation of the interval, part b. E) a. A point estimate for 7: is D. b. The 90% condence interval for the population proportion Jr. is (EH1). (Round to two decimal places as needed.) c. Interpret this interval. 0 A. We are condent that 90% of the population use a cell phone while driving. 0 B. We are condent that 90% of the population do not use a cell phone while driving. 0 C. We are 90% condent that the population proportion of drivers using cell phones is inside this interval. 0 D. There is a 90% percent chance that the population proportion of drivers who use cell phones is outside this interval