Question

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. 1194 1292 1292 1250 1268 1316 1275 1317 1275 (a) Use a calculator with mean and standard deviation keys to find the sample mean year $\bar{x}$ and sample standard deviation $s$. (Round your answers to four decimal places.) 1198.78 82.75 (b) Find a 90% confidence interval for the mean of all tree-ring dates from this archaeological site. (Enter your answer in the form: lower limit to upper limit. Include the word \"to.\" Round your numerical values to the nearest whole number.) 1266to1309

          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.
1194
1292 1292 1250 1268 1316 1275 1317 1275
(a) Use a calculator with mean and standard deviation keys to find the sample mean year $\bar{x}$ and sample standard deviation $s$. (Round your answers to four decimal places.)
1198.78
82.75
(b) Find a 90% confidence interval for the mean of all tree-ring dates from this archaeological site. (Enter your answer in the form: lower limit to upper limit. Include the word \"to.\" Round your numerical values to the nearest whole number.)
1266to1309

$The method of tree-ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1194 1292 1292 1250 1268 1316 1275 1317 1275 (a) Use a calculator with mean and standard deviation keys to find the sample mean year x̅ and sample standard deviation s. (Round your answers to four decimal places.) 1198.78 82.75 (b) Find a 90% confidence interval for the mean of all tree-ring dates from this archaeological site. (Enter your answer in the form: lower limit to upper limit. Include the word \"to.\" Round your numerical values to the nearest whole number.) 1266to1309$

Added by Julia Y.

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