[Study guide - Midterm 2-different numbers] 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=30 each day. Data from the previous 10 days indicate the following number of out-of-state license plates: DayOut-of-state Plates 1 6 2 3 4 5 7 5 6 7 8 3 4 5 3 11 9 10 Calculate the overall proportion of tourists" (cars with out-of-state plates) and the standard deviation of proportions. p-bar -0,1867. Standard deviation-0.07114 None of the abve p-bar -0.2867, Standard deviation-0.06114 p-bar-0.124, Standard deviation - 0.0634 p-bar -0.224 Standard deviation - 0.0834