Shards of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels found at the Wind Mountain archaeological site

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Shards of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels found at the Wind Mountain archaeological site. A random sample of ceramic vessels gave the following rim diameters (in centimeters):

15.9 - 13.4 - 22.1 - 12.7 - 13.1 - 19.6 - 11.7 - 13.5 - 17.7 - 18.1

(A) With mean and sample deviation verify that x bar is about equal to 15.8 cm and s equal to 3.5 cm.

(B) Compute an 80% confidence interval for the population mean (mhu) of rim diameters for such ceramic vesselsfound at the Wind Mountain archaelogical site.