Archaeology: Pottery Shards of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels found at the Wind Mountain archaeological site (see source in Problem 7). A random sample of ceramic vessels gave the lollowing rim diameters (in centimeters): 15.9 13.4 22.1 12.7 13.1 19.6 11.7 13.5 17.7 18.1 (b) Compute an 80% confidence interval for the population mean ,u of rim diameters for such ceramic vessels found at the Wind Mountain archaeological site