Question: Suppose the method of tree ring dating gave the following dates A.D. for an archaeological excavation site.

1232 1129 1268 1314 1253 1184 1278 1219 1227

Find a 99% confidence interval for the mean of all tree ring dates from this archaeological site.

a) Use your calculator or excel to find the mean and standard deviation for the sample

b) Now, calculate confidence interval (you may use excel or your calculator)

c) Write an interpretive sentence for the interval found above