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 distributi 1,194 1,201 1,313 1,187 1,268 1,316 1,275 1,317 1,275 n USE SALT (a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to four decimal places.) A.D. S = yr (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 A.D. A.D. upper limit

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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 distributic
1,194
1,201
1,313 1,187 1,268 1,316 1,275
1,317
1,275
5 USE SALT
(a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to four decimal places.)
A.D.
S =
yr
(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
A.D.
upper limit
A.D.
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Transcribed Image Text: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 distributic 1,194 1,201 1,313 1,187 1,268 1,316 1,275 1,317 1,275 5 USE SALT (a) Use a calculator with mean and standard deviation keys to find the sample mean year x and sample standard deviation s. (Round your answers to four decimal places.) A.D. S = yr (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 A.D. upper limit A.D. Aol acer -> esc backs ! @ 24 5 6. 7 9. 1 2 3 4 r t y e tab k d. f * 00
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