2:25 2:40 2.75 100 1.25 1.40 175 4. Estimate the standard deviation to 2 significant digits. ( x-bar = 3.2, n = 330). Show thought process. (Full credit if within 0.06, 3 pts if within 0.1) [ 4 pts] 5. The proportion of 2-year colleges in my sample that are located in rural settings is 0.16. From simulating samples of that size, I get SE = 0.037. a) Find a 95%% confidence interval for the proportion of 2-year colleges located in rural settings. Show thought process. Give your answer in left endpoint