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.1,215 1,285 1,271 1,264 1,268 1,316 1,275 1,317 1,275(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.X =S =yr(b) When finding an 90% confidence interval, what is the critical value for confidence level? (Give your answer to three decimal places.)tc=What is the maximal margin of error when finding a 90% confidence interval for the mean of all tree-ring dates from this archaeological site? (Round your answer to the nearest wholenumber.)E =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 limitA.D.upper limitA.D.

1215,1285,1271,1264,1268,1316,1275,1317,1275 sample size(n)=9

Answered: The method of tree-ring dating gave the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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 distribution. 1,285 1,187 1,285 1,285 1,285 1,306 1,320 1,285 (a) Find the sample mean year x and sample standard deviation s. (Round your answers to four decimal places.) x = A.D.s= yr (b) When finding an 85% confidence interval, what is the critical value for confidence level? (Give your answer to three decimal places.) tc = What is the maximal margin of error when finding a 85% confidence interval for the mean of all tree-ring dates from this archaeological site? (Round your answer to the nearest whole number.) E = Find a 85% 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. The method of tree-ring dating gave the following years A.D. for an archaeological excavation site.…
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