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: [10 points]

Day	Out-of-state Plates
1	4
2	8
3	7
4	5
5	9
6	4
7	5
8	6
9	4
10	11

(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?