PROBLEM B: Use the following to answer questions 17 - 19: A small, independent amusement park collects data on the number of cars with out-of-state license plates. The sample size is fixed at n=25 each day. Data from the previous 10 days indicate the following number of out-of-state license plates: Day Out-of-state Plates 00aWN 17. Calculate the overall proportion of "tourists" (cars with out-of-state plates) and the standard deviation of proportions. (a) p-bar = 0.224; the standard deviation of proportions = 0.0834 (b) p-bar = 0.244; the standard deviation of proportions = 0.0834 (c) p-bar = 0.224; the standard deviation of proportions = 0.006953 (d) p-bar = 0.244; the standard deviation of proportions = 0.007378 18. Using +30 limits, calculate the LCL and UCL for these data. (a) UCL = .4942; LCL=0 (b) UCL - ,4742; LCL-0 (c) UCL-231; LCL = 0.219 (d) UCL = 245; LCL -0.203 (e) UCL = 266; LCL -0.222 19. Is the process under control? (a) Days 4 and 5 are above the UCL. The process is out of control, (b) Day 10 is below the LCL. The process is out of control. (c) All the points are within the control limits. The process is in control. (d) Day 5 is above the UCL. The process is out of control