Question textThe State of California wishes to estimate the proportion of drivers who use their cell phones while driving. In a random sample of 250 California drivers 94 of these drivers stated that they used their cell phones while driving. Construct a 96% confidence interval for the true proportion of California drivers who use their cell phones while driving.
Question 2Not answeredMarked out of 5.00Flag questionQuestion textIn a study of starting salaries paid by two large corporations, Corporation A and Corporation B, two independent random samples were taken. For 14 new employees of corporation A, the mean starting salary was $37,940 with a standard deviation of $5,280. For 14 new employees of corporation B, the mean starting salary was $42,110 with a standard deviation of $8,560. Compute and use a 95% confidence interval for the difference in the mean starting salaries of the two corporations to select the best answer below. Assume that both populations are normally distributed.