a.) The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution.
1229 | 1236 | 1271 | 1229 | 1268 | 1316 | 1275 | 1317 | 1275 |
mean = 1268
standard deviation = 33
(b) Find a 90% confidence interval for the mean of all tree ring
dates from this archaeological site. (Round your answers to the
nearest whole number.)
lower limit;
upper limit;
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