Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to one decimal place.) x = A.D. s = yr ii-What is the value of the sample test statistic? (Round your answer to three decimal places.)
Tree-ring dating from archaeological excavation sites is used in conjunction with other chronologic evidence to estimate occupation dates of prehistoric Indian ruins in the southwestern United States. Suppose it is thought that a certain pueblo was occupied around 1294 A.D. (based on evidence from potsherds and stone tools). The following data give tree-ring dates (A.D.) from adjacent archaeological sites:
| 1189 | 1267 | 1268 | 1275 | 1275 | 1271 | 1272 | 1316 | 1317 |
1230 |
(i) Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to one decimal place.)
| x | = | A.D. |
| s | = | yr |
ii-What is the value of the sample test statistic? (Round your answer to three decimal places.)
given data :
1189,1267,1268,1275,1275,1271,1272,1316,1317,1230
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