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: (a) Calculate the overall proportion of "tourists" (cars with out-of-state plates) and the standard deviation of proportions. (b) Using a 95.45% confidence, calculate the LCL and UCL for these data. (c) Draw the control chart? (d) Is the process under control? Explain why. (e) What type of variation is present