According to a newspaper, 63% of high school seniors have a driver's license. Suppose we take a random sample of 200 high school seniors and find the proportion who have a driver's license. a. What value should we expect for our sample proportion? b. What is the standard error? c. Use your answers to parts (a) and (b) to complete this sentence: We expect % to have their driver's license, give or take %. d. Suppose we increased the sample size from 200 to 400. What effect would this have on the standard error? Recalculate the standard error to see if your prediction was correct.